After telling her dog Banana about her loose tooth and discovering that some of her friends do not believe in the Tooth Fairy, Anna makes an impulsive bet with a pesky boy who also has a loose tooth.
Twelve-year-old Tom Jenkins relates how he caught a tooth fairy in his bug jar two years earlier and Marvin's reluctance to be released from captivity.
The tooth fairy is trying to collect a tooth at the house of Natalia Kennedy Caballero when she encounters a mouse who seems to be attempting to do her job. Presented in English and Spanish.