The Vulture Patrol returns from a scouting mission on the east African coast and tell Noah that they saw some animals trapped in a long-abandoned zoo. Rocco and Ursula are sent out to help the animals, and Rocco recognises the zoo as the one he was born and raised in. During the rescue mission, Rocco is reunited with Imshee, a warthog he knew when he was a child. Meanwhile, a stampeding herd of gnus find their way onto the Island and wreak havoc.