Kevin McKay, the bus driver, must navigate a bus carrying children and their teacher to safety through the 2018 Camp Fire, which was the deadliest fire in California history. His challenges include managing the safety of the children amid rapidly spreading wildfire conditions and making critical decisions under extreme pressure to avoid danger zones.

Mary Ludwig, the school teacher, plays a key role in keeping the children calm and organized during the evacuation on the bus. She supports Kevin McKay by helping manage the children’s safety and emotional state as they face the life-threatening wildfire.

The film features interactions among Kevin McKay (bus driver), Mary Ludwig (teacher), and Ray Martinez, though specific conflicts or detailed interactions are not fully described in available sources. Their roles suggest collaboration under crisis conditions to ensure the children’s safety during the wildfire evacuation.

Ruby and Hopkins are part of the supporting cast involved in the evacuation scenario. While detailed plot points about their specific actions are not provided, they likely contribute to the group dynamics and survival efforts during the wildfire crisis.

Available information does not specify whether the film includes flashbacks or detailed backstory elements explaining how the characters came to be on the bus during the Camp Fire. The focus is primarily on the evacuation journey and survival during the wildfire.