Matthew, a young advertising executive in Chicago, puts his life and a business trip to China on hold when he thinks he sees Lisa, the love of his life who left him without a word two years earlier, walking out of a restaurant one day.

Mort Rainey, a writer just emerging from a painful divorce with his ex-wife, is stalked at his remote lake house by a psychotic stranger and would-be scribe who claims Rainey swiped his best story idea. But as Rainey endeavors to prove his innocence, he begins to question his own sanity.