In episode 1, Olivia confronts Liam with receipts on her phone and detailed accusations from another woman claiming they slept together. Liam denies knowing the woman and lying about the affair, but his behavior suggests he is not truthful.

Liam immediately denies the cheating accusations, claiming he does not know the woman involved and swears he did not do it. However, his demeanor appears deceptive, described as looking like a 'deer in headlights' and lying through his teeth.

Episode 1 features couples including Shaun and Tegan, as well as Olivia and Liam. The episode reveals tension and mistrust, especially focusing on Olivia's confrontation with Liam over infidelity. Other characters like Rebecca and Craig are hinted to have complicated interactions, with some mutual attraction noted.

Amanda Holden and Paul C. Brunson serve as host and relationship expert, respectively, guiding eight couples affected by infidelity as they confront past mistakes, attempt to rebuild trust, and decide their future together or apart.

The couples meet in a paradise retreat designed to address infidelity issues. The setting facilitates honest conversations and confrontations about cheating, as seen with Olivia and Liam's interaction, aiming to help couples rebuild or end their relationships.