Not many people know that every house is secretly inhabited by little monsters! These furry creatures take care of a family’s house but cannot be seen. Finnick is a little monster, who doesn’t seem to care about his responsibility of making a home out of the house. But everything changes after a new family comes to his house. When Finn meets 13-year-old Christine, inexplicable events begin to happen in the city and life will never be the same again!

Father Frost decides to send Yaga to be re-educated by Petya, a boy who has his own problems - he wants to reconcile his parents before the New Year. Petya's parents spend more time working than they do with their family, and Petya wants to fix this situation before the New Year.