Two strangers, Hugo and Rayne, must live together in a nuclear bunker for 100 days to win $500,000, facing various challenges and twists, including a daily alarm that could burn their prize money if not deactivated in time. Despite tensions and multiple tempting offers to leave, they manage to stay and win the prize by working together and overcoming the psychological and physical challenges of bunker life.

Two strangers, Hugo and Rayne, are challenged to live in a nuclear bunker for 100 days to win half a million dollars. They must navigate living together, growing their own food, and dealing with a daily random timer that could incinerate their prize if they fail to stop it in time.

In this chapter, participants are offered an additional $50,000 to their prize pool if they agree to reduce the timer from one minute to 30 seconds, which they accept. Later, they decline another $50,000 offer to turn off the alarm sound, and continue to excel in the challenge, even discovering a hidden surprise under the floorboards.

Hugo and Rayne face a tough decision when offered $100,000 to leave the bunker, but they ultimately choose to stay together. Tensions rise as Hugo feels burdened by chores, and the introduction of a new contestant, Ryan Trahan, adds to the strain on their relationship.

Hugo and Rayne are struggling to get along during their 100-day challenge, which threatens their chances of success. To help them bond, a friendship test is conducted, leading to a heartfelt moment where they express their motivations for winning for each other.

Hugo and Rayne struggle with restlessness and tension after spending over 60 days in a bunker. Despite offers of money to increase their discomfort, they choose to maintain their current situation, leading to growing friction and careless mistakes.