Risto Räppääjä ja polkupyörävaras

Risto's aunt, Rauha, goes on a vacation with her boyfriend Lennart and her cousin Elvi returns to take care of Risto once again. However during Elvi's visit, Risto's bike mysteriously disappears. Risto and his best friend Nelli suspect someone stole it and now together they must find out who did it at all costs.