Maggie is working at the Wild at Heart clinic when a greyhound with an unusual injury comes in. Its owner won't give her full name or address. The next day a kitten arrives, badly injured from a greyhound attack. Maggie's determined to find out what's going on. Meanwhile, a new girl at school, Darla, is trying to take over Maggie's greyhound research--and her starring position on the basketball team. Can Maggie stay focused on the greyhounds and find a way to help them--before it's too late?