On this mission, animal adventurer Donald Schultz travels to the exotic nation of Belize, nestled between Mexico and Guatemala on the Caribbean coast of Central America. He sets out on a dramatic search for deadly animals that are the targets of poachers, like crocodiles, sharks and rays. His goal is to collect blood and tissue samples needed for research before these endangered animals disappear. He heads into the dense rain forest canopy to track down the loudest animal in the world - the howler monkey - a critically endangered primate that's falling prey to poachers. While there, Donald stumbles on his least favorite creature - a tarantula spider that's nearly as big as his hand. In an unusual "milking" procedure, Donald anesthetizes the spider, then uses a tiny electric shock to draw its rare and understudied venom.