This is the story of a sweet-natured fellow named Charlie Baileygates(Jim Carrey), a trooper in the Rhode Island State Police. He is otherwise mild-mannered and non confrontational until somebody or something pushes him a little too far. That's when his maniacal alter-ego, Hank Evans, takes over. After Charlie developed multiple personalities, the colonel forces Charlie to escort Ms. Irene Waters(Ren?e Zellweger), a woman wanted by the police in upstate New York, back to her home town, but when he discovers she's really being set up for murder, he helps her flee back to the safety of his own jurisdiction. It's all up to Charlie to keep Irene save from her evil corrupt ex-boyfriend Dickie Thurman(Daniel Greene) along with his associates, who plan on killing her, thinking she knows everything that's going on.