Simon travels across Central America, from the Caribbean to the Pacific. Along the way, he goes diving on a coral reef on the coast of Belize, and witnesses a gun battle between park rangers and intruders in Chiquibul National Park. He also discovers how climate change has left Guatemala devastated by famine and drought, reports on measures to curb gang violence in El Salvador, and learns how Costa Rica aims to become the world's first carbon neutral country by 2021.