On the day before Christmas Eve, the eminent family Åkerö, take a suite at the main hotel in Valleby. With them, they have their extremely valuable, most-prized possession – a Chinese apple dachshund. The hotel manager promises the family to take meticulous care of the dog, but then the unthinkable happens. The dog goes missing without a trace! LasseMaja’s Detective Agency gets involved in a tricky case.