Undine gets along well with her unconventional mother, she adores her baby brother, and she has a devoted kindred spirit in her best friend and next-door neighbor, Trout. It's inconvenient that Trout has a sloppy crush on her, but Undine tries to overlook this. Undine is basically satisfied . . . until strange things begin happening to her.

It starts with an odd feeling, a shadow in the mirror, a whisper only Undine can hear: It's time to come home. And it builds. One hot day, when Undine imagines knitting together a few scattered clouds, she creates a massive thunderstorm.

Who is Undine? Where does her power come from? What is she meant to do? Undine needs answers to these questions, so she sets off in search of a father she'd always believed was dead and a self she's only beginning to discover. But Undine's magic is powerful, wild, and dangerous -- and her feelings as she uncovers the truth are even fiercer. Will Undine find herself or lose herself . . . and everyone she loves?