At Animal Ark, Mandy Hope helps her parents treat animals of all shapes and sizes. Even outside the clinic, Mandy can't resist helping any animal in need. Mandy's been spending a lot of her Florida vacation at the local animal park, playing with two tame dolphins, Bob and Bind. The dolphins are happy performing together — but when Bob dies, Bing is miserable without his best friend. Mandy and her friend Joel are worried about Bing's future, until they come up with a daring plan. Can Mandy and Joel help the lonely dolphin, before it's too late?