Alex sneaks into the zoo to visit his favorite animal, but when a cat sneaks through the same hole and gets lost he must find her before any of the other animals do.

Tori loves living on Zoo Lane with her family. Who else gets to live at a zoo--and with her cousin Sumiko visiting from Tokyo soon, this is shaping up to be the best summer ever! But when rumors of a missing animal start to spread, Tori wants to help...except she doesn't know which creature is on the loose. An ostrich? A little frog? There's also a strange noise coming from her backyard. It almost sounds like someone is calling her name! Tori is on...