 Good but reserved dentist Catherine, killed in an accident, finds herself in Limbo, needing to account for her life, and correct her one flaw before being admitted to heaven: not being able to let herself go. Selected as a tooth fairy, she has to collect kids  baby teeth every night, and soon learns the kids can see her, but not the adults. Inadvertently offering advice to troubled Bobby, she finds her fame spreading around his school. Soon, all the kids start "losing" their teeth to induce her visits, and get help with advice, lessons, bullying, etc. But the parents react negatively to all the talk of a tooth fairy, while Catherine gets into trouble for interfering with human lives...