Polly Michaels is trying to forget that her mom has cancer. She keeps busy at school and plods through a normal social life. Until a freak electrical storm and a unicorn appear in the orchard next to her house. Sy'kai wakes on an orchard floor to the smell of rotting cherries and wet earth. She doesn't know where she is-or what she is-but she knows something is hunting her. Polly recruits her friends to find the mysterious creature...