Charlie (Jim Carrey) is a kind patrolman. His wife eloped with her lover after having three sons after having an affair with someone else. However, Charlie still regards his three sons as his own, and his sons also respect this father very much. People in the town bully Charlie's kindness, and finally another ruthless character hidden in Charlie - A Qing appears. A Qing is completely different from Charlie. He makes trouble everywhere. The police examined Charlie and found that he suffered from schizophrenia and needed medication. At this time, Charlie was escorting the beautiful Elaine (Renee Zellweger) back to New York, but the illegal things done by Elaine's former boss Dick were reported. He believed that the reporter was Elaine, so Dick bribed the police and others and vowed to kill Elaine. Elaine asked Charlie for help, so the two and A Qing started a desperate journey together. Charlie's medicine was lost in the hotel, so Charlie and A Qing changed without warning along the way. What's more complicated is that Charlie and A Qing both fell in love with Elaine, and Charlie and A Qing were jealous and fighting constantly. The police and Dick have been chasing Charlie and his friends...