Through a series of comedy events, the movie follows star hockey player Derek Thompson who has made a mistake leading him to be a full-fledged tooth fairy for a week as a punishment. Although the mockery he has gotten from his friends during his new position, he has managed to know many things about himself during this punishment.
This comedy is essentially a goofy premise with some nutty dialog and set pieces pasted onto it. But it's watchably entertaining, even though the filmmakers miss almost every opportunity for sublime absurdity.
The one element that lifts this above utter tedium is the presence of Stephen Merchant as tooth-fairy administrator Tracy. That he manages to come away with his dignity intact is testament to his skill as a comedian.