Former military man Chance Davis is paired with optimistic naturalist Melissa Miller in the jungles of Ecuador. Humidity, violent storms, caiman and red-bellied piranha are just some of the threats they face. When they make it to Day 20, in a series first, they are given a choice: finish their challenge or join the cast of Naked and Afraid XL. Chance decided to compete with the XL group and Melissa completed her challenge in Day 21.