Already at the registration, Pekka Kirnuvaara noticed: His new dentist has the same unusual last name as he does. And he practically has the same nose. In response to Pekka's probing questions about their origins and family, Esko, in turn, responds with relentless drilling. It is only shortly before the end of the treatment that he finally admits they must be half-brothers and agrees to help Pekka search for their common father, who has left a trail of descendants across half the world. A crazy search begins, taking them from Northern Europe through Asia to Australia, ultimately reuniting Pekka and Esko with all their half-siblings.