The episode begins with the Straw Hat Pirates sailing through the Grand Line on their ship, the Going Merry. They are in high spirits after their recent adventures in Alabasta. As they navigate the waters, they come across a mysterious fog that envelops their ship, causing visibility to drop significantly. The crew is initially confused and concerned about the sudden change in their environment.

As the fog thickens, they hear a strange sound, which draws their attention. Suddenly, a colorful mist appears, and the crew is captivated by its beauty. However, the mist also brings an eerie feeling, and they realize they are entering a strange area known as Luluka Island. The crew decides to investigate, intrigued by the legends surrounding the island and the mist.

Upon arriving at Luluka Island, they encounter a peculiar old man named Henzo, who is the guardian of the island. Henzo is initially wary of the Straw Hats, believing them to be a threat. He explains that the island is cursed and that the Rainbow Mist is a manifestation of the spirits of the island. He warns them that anyone who gets lost in the mist may never return. Despite his warnings, the crew is determined to explore the island and learn more about the Rainbow Mist.

As they delve deeper into the island, they discover that the mist has the power to bring out the dreams and desires of those who enter it. Each crew member experiences their own visions, revealing their innermost thoughts and aspirations. Luffy, for instance, is filled with excitement about becoming the Pirate King, while Nami dreams of a world where she can freely navigate the seas. The crew's emotional states fluctuate as they confront their dreams, leading to moments of joy and introspection.

However, the mist also has a darker side. The crew soon realizes that the mist can trap them in their dreams, making it difficult to distinguish between reality and illusion. As they struggle to maintain their sense of self, they encounter various creatures and illusions that challenge their resolve. The crew must work together to overcome these obstacles, relying on their bonds and teamwork to navigate through the chaos.

During their exploration, they come across a group of children who have been trapped in the mist for years. The children are frightened and confused, having lost their way in the fog. The Straw Hats feel a strong sense of responsibility to help them, and they decide to rescue the children from the clutches of the Rainbow Mist. Henzo, seeing their determination, reluctantly agrees to assist them, revealing that he has been unable to leave the island due to his own past mistakes.

As they formulate a plan to save the children, the crew faces a series of challenges, including confrontations with the manifestations of their fears and doubts. Each member of the crew must confront their own personal struggles, leading to moments of vulnerability and growth. They learn to trust each other more deeply, reinforcing their bonds as a crew.

In a climactic moment, the crew confronts the source of the Rainbow Mist, a powerful entity that feeds on the dreams and fears of those who enter its domain. A fierce battle ensues, with the Straw Hats using their unique abilities and teamwork to fight against the entity. Luffy leads the charge, showcasing his determination and strength, while the others support him with their own skills.

After an intense struggle, the crew manages to defeat the entity, dispelling the mist and freeing the trapped children. The island begins to return to normal, and Henzo expresses his gratitude to the Straw Hats for their bravery. He acknowledges his own past mistakes and vows to protect the island moving forward.

As the episode concludes, the Straw Hats bid farewell to Henzo and the children, leaving Luluka Island behind. They set sail once again, their spirits high and their bonds stronger than ever. The crew reflects on their adventure, cherishing the memories they created and the lessons they learned from their encounter with the Rainbow Mist.

In the ending of "One Piece" episode 139, the Straw Hat Pirates successfully defeat the Rainbow Mist and free the island of Luluka from its curse. They help Old Man Henzo regain his courage and resolve, allowing him to confront his past. The crew departs the island, continuing their journey with a renewed sense of adventure and camaraderie.

As the episode unfolds, the Straw Hat Pirates arrive at Luluka Island, a place shrouded in mystery and legend. The island is plagued by the Rainbow Mist, a phenomenon that traps the souls of those who have lost their way. The crew encounters Old Man Henzo, a once-brave warrior who has become a shadow of his former self, haunted by the loss of his comrades to the mist.

Scene by scene, the narrative begins with the Straw Hats sailing towards Luluka Island, their ship gliding through the vibrant waters. The atmosphere is filled with a sense of curiosity and anticipation. As they dock, they are greeted by the eerie sight of the Rainbow Mist swirling ominously around the island, casting a colorful yet foreboding glow.

The crew splits up to explore the island, with Luffy, Zoro, and Nami venturing deeper into the mist. They soon encounter the spirits trapped within, who reveal their sorrow and longing for freedom. The emotional weight of their plight resonates with the crew, particularly with Luffy, who feels a strong urge to help.

Meanwhile, Sanji and Usopp meet Old Man Henzo, who is initially reluctant to share his story. However, as they press him, he reveals his past as a brave warrior who once fought against the mist but lost his friends in the process. His guilt and fear have kept him from confronting the mist again. Sanji and Usopp encourage him to find his courage, emphasizing the importance of facing one's fears.

As the crew gathers information, they learn that the only way to dispel the mist is to confront the source of its power. They devise a plan to face the Rainbow Mist together, showcasing their unity and determination. The emotional stakes rise as they prepare for the confrontation, each member reflecting on their own fears and the bonds they share.

In the climactic battle against the Rainbow Mist, the crew fights valiantly, using their unique abilities to combat the swirling colors and the spirits trapped within. Luffy leads the charge, embodying the spirit of adventure and bravery that defines the Straw Hat Pirates. The battle is intense, filled with moments of tension and teamwork, as they work together to break the curse.

As they finally confront the heart of the mist, Old Man Henzo finds the strength to join them, confronting his past and the loss of his friends. His emotional breakthrough allows him to channel his energy into the fight, helping to dispel the mist once and for all. The spirits are freed, and the island is bathed in light, symbolizing hope and renewal.

With the mist lifted, the crew celebrates their victory, and Old Man Henzo is transformed, regaining his confidence and purpose. He thanks the Straw Hats for their help, acknowledging that they have reignited the fire within him. The crew bids farewell to Henzo, leaving him with a sense of closure and a newfound resolve to protect Luluka Island.

As the episode concludes, the Straw Hat Pirates set sail once more, their bonds strengthened by the adventure. They are filled with excitement for the journey ahead, ready to face whatever challenges await them on the Grand Line. Each character reflects on the experience, carrying with them the lessons learned about courage, friendship, and the importance of confronting one's fears.

In the episode "Legend of the Rainbow Mist! Old Man Henzo of Luluka Island!" from One Piece, there is no post-credit scene. The episode concludes without any additional content after the credits roll. The focus remains on the main storyline and character interactions throughout the episode, particularly highlighting the adventures of the Straw Hat Pirates as they encounter the mysterious Rainbow Mist and the old man Henzo on Luluka Island. The narrative wraps up with the resolution of the episode's plot, leaving no further scenes or teasers for viewers after the credits.

The episode highlights the theme of friendship through the camaraderie and support among the Straw Hat Pirates as they face the dangers of the Rainbow Mist. Their determination to help each other and the bonds they share are emphasized during their encounters with the mist and Old Man Henzo.

The Rainbow Mist is a mysterious phenomenon that envelops Luluka Island, creating a magical barrier that traps ships and people within its colorful fog. It serves as a central plot element, leading the Straw Hat Pirates to investigate its origins and the legends surrounding it.

Old Man Henzo is a key character in this episode, serving as the guardian of Luluka Island. He provides the Straw Hat Pirates with crucial information about the Rainbow Mist and its connection to the island's history, as well as the dangers it poses.

While navigating the Rainbow Mist, the Straw Hat Pirates encounter various challenges, including illusions and the threat of being trapped forever. The mist creates a disorienting environment that tests their resolve and teamwork as they seek to uncover the truth behind the legend.

Luluka Island has a rich backstory tied to the Rainbow Mist, which is said to be a remnant of a great battle that occurred long ago. The island's history is intertwined with the mist, as it is believed to be a protective barrier created by the spirits of those who fought, adding depth to the island's lore and the challenges faced by the Straw Hat Pirates.

In the episode "Legend of the Rainbow Mist! Old Man Henzo of Luluka Island!" from One Piece, there are a few elements that may be considered potentially objectionable or upsetting for children or sensitive viewers:

1. Mysterious and Dark Atmosphere: The episode features a mystical mist that creates a sense of unease and confusion, which may be unsettling for younger viewers.

2. Ghostly Figures: The appearance of ghost-like entities can be frightening, as they are depicted in a way that evokes fear and mystery.

3. Conflict and Tension: There are moments of conflict and tension between characters, which may include aggressive behavior or threats, though it is presented in a fantastical context.

4. Emotional Struggles: Characters experience feelings of loss and regret, which may resonate deeply and evoke sadness.

5. Mild Violence: While the violence is not graphic, there are scenes of combat and peril that may be intense for some viewers.

Overall, while the episode contains fantastical elements typical of the series, these aspects may require parental guidance for younger audiences.