When Ellie Quicke's friend, Felicity, witnesses a Pitbull savage a young mother in the park, she goes into shock and calls on Ellie for help. Ellie's enquiries indicate that the dog and its owner are strangers to the neighbourhood, but soon there are other attacks . . . and after each one, the dog vanishes. Driven to distraction by a wealth of problems in her personal life, Ellie hardly has time to hunt down a killer dog and has no idea that she is the next target - until the police question her for a crime she didn't commit.