Marvin Manger (Rob Schneider), who is timid and frail, wants to be a brave and powerful policeman like his father, but due to his personality, he can only serve as an administrator in the evidence department of the police station at best. He does not get any respect in life, his peers laugh at him, children tease him, and even the neighbor's dog bullies him. One day, Marvin, who was on duty alone at the police station, received a call from the police, but all the police went to the stadium to have fun. In desperation, Marvin drove alone to the police station, but he encountered a serious car accident and his life was hanging by a thread. In times of crisis, he was rescued by a mysterious person and found himself unharmed when he woke up. However, Marvin later showed many animal-specific habits. It turned out that the mysterious person transplanted animal organs for him. Marvin's life has undergone a huge change...