Martin Stillwater has a vivid imagination. It charms his loving wife, delights his two little daughters, and gives him all the inspiration he needs to write his highly successful mystery novels. But maybe Martin`s imagination is a bit too vivid. One rainy afternoon, a terrifying incident makes him question his grip on reality. A stranger breaks into his house, accusing Martin of stealing his wife, his children - and his life. Claiming to be the real Martin Stillwater, the intruder threatens to take what is rightfully his. The police think he`s a figment of Martin`s imagination. But Martin and his family have no choice but to believe the stranger`s threat. And run for their lives. But wherever they go - wherever they hide - he finds them.