Lily's summer is off to a rocky start. Her best friends have abandoned her for sleep-away camp, without even considering whether she'd want to go or not. Worse, she's stuck with a long summer reading list her parents insist she finish when all she really wants to do is hang out at the aquarium so she can learn everything she'll need to know to become a marine biologist someday. They don't understand her dreams.

So when Lily discovers a dolphin in a nearby canal, she's torn. She knows she shouldn't be spending all her time watching over the sweet, playful creature. But if the dolphin can't find the way back to its pod in the bay, it could be in serious trouble. Lily can't help feeling that saving the dolphin might just be her destiny.