Diego is in Central Africa visiting his friend Juma, who is going to introduce him to a new Baby Gorilla who is about to become the King of the Mountain. But the playful gorilla wanders off! Diego goes in search of the Baby Gorilla while Juma stays behind to get the ceremony ready for the new King! To Diego's surprise, he doesn't find one baby gorilla, but two! They're twins! There will be two new Kings! To get them back Diego will have to play gorilla games with them, find them food and even carry them on his back while they sleep. When Diego gets the babies back to the mountain, he and Juma crown them the new Kings of the Mountain. Yay!