After a publisher changes a writer’s debut novel about a deadly assassin from fiction to nonfiction, the author finds himself thrust into the world of his lead character, and must take on the role of his character for his own survival. The action comedy stars Kevin James as Sam Larson, a mild-mannered would-be author who gets mistaken for a killer-for-hire when his fictional novel about an international assassin is published as a true story. When the book is a huge success, he is suddenly kidnapped, taken out of the country, and forced into an assassination plot.