Derek Thompson is a
minor league ice hockey player, nicknamed "
Tooth Fairy" for his habit of shoving opposing players so hard, their teeth come out. One night, he steals a dollar from his
girlfriend Carly's six-year-old daughter Tess that had been left for her lost tooth, telling her that the tooth fairy doesn't exist. He receives a
magical Summons under his pillow, which causes him to grow wings and transports him to the realm of tooth fairies. He meets his caseworker, Tracy, and the head fairy, Lily, and develops an adversarial relationship with both. Lily sentences Derek to serve as a tooth fairy for two weeks as a punishment for his unsympathetic dealings with children like Tess. Later, he meets Jerry, who gives him his tooth fairy supplies, which include "Shrinking Paste," "Invisible Spray," "
dog peppermints", "
Amnesia Dust", "cat away" and a magic wand that will only work if he believes. Carly's 14-year-old son, Randy, dislikes Derek. Randy wants to grow up to be a
heavy metal star. When Derek defends Randy against a bully, he begins to win him over, and he begins teaching Randy to play his electric guitar better so he can win a talent show. Derek visits several children and tries to collect teeth and give out dollars, but a mixture of obstacles, incompetence, and bad luck causes him to fail. Lily denies Derek any more supplies from Jerry for the remainder of his sentence, criticizing his lack of faith in children. Afterward, he is approached by a fairy named Ziggy who provides him
black market supplies. Later that night, the items malfunction and Derek is seen by a child's mother and arrested. Tracy tells Derek that Lily extended his duty to three weeks and offers to give him proper supplies if he will start acting like a tooth fairy; Carly soon comes to bail Derek out. Derek works on improving his tooth fairy skills and bonding with Tracy and Randy, but when Derek can't score a goal at a hockey game, his coach threatens to bench him at the next game. When he sees Carly and her kids, he takes his frustration out on Randy, telling him that he will never become a rock star. Randy tearfully smashes his guitar, and Carly breaks up with him. Later, Tracy comes to Derek's house to announce that he is a tooth fairy-in-training, much to Derek's annoyance. At the next hockey game, Derek gets back on the ice and sees Tracy, who silently encourages him to score a goal, which he does, finally learning the importance of dreams. Tracy then reveals to Derek that his next tooth fairy assignment is at Tess' house, and Derek accepts the job, gets into his tooth fairy costume, and flies away, while Tracy spreads Amnesia Dust on the audience to cover up the event. At Carly's, Tess sees Derek taking her tooth, and he reveals that he is a tooth fairy, which she promises to keep secret. Derek apologizes to Randy and encourages him to keep pursuing his dreams, using his magic wand to grant Randy a new guitar. Downstairs, Carly sees Derek as a tooth fairy but assumes that he rented a costume for Tess' sake, causing her to forgive him. Derek flies Randy to the talent show, throwing Amnesia Dust on him when they arrive. Derek heads back to the fairy realm to give Lily the tooth and is told that because of this job, as well as for reaffirming Tess' belief, he has been relieved of his fairy duties. Lily explains that he will never see the tooth fairies again and will have Amnesia Dust thrown on him. Before departing, Derek says a friendly goodbye to Tracy. Lily throws Amnesia Dust on Derek and transports him back to the talent show. There, Randy outperforms everyone and forms a band. Derek's newfound optimism remains intact, and he proposes to Carly, who accepts. Later, Derek is seen playing
left wing for the
Los Angeles Kings, and when he sees Lily and Jerry in the crowd, he doesn't recognize them. Jerry secretly helps him score a goal. ==Cast==