When 12-year-old Elsi Björkman and her mother Paula return from a week's holiday abroad, Elsi immediately notices that someone has been in her room. She tells her mother about it, but she does not believe her. At the local supermarket Elsi meets Henry, who seems to spend his time returning shopping trolleys. Elsi does not know anything about the boy, who has an irritating habit of appearing from out of nowhere, only to disappear again, as if into thin air. Nevertheless, the children become friends.

One winter in the 1930’s somewhere in northern Finland, a first communion ceremony is interrupted by the arrival of mobile dental surgery. All the children in the village must have their teeth replaced with sets of dentures as a communion gift to prevent future problems. The fate of Juha’s teeth seems to be sealed, unless a higher power decides to intervene…