When teenager Dante's parents go on vacation, they give him strict instructions not to "make anything up" while they're away. But when Dante and his friend Tvärsan find a diamond ring in the snow, they're drawn into an exciting detective adventure.
| Actor | Role |
|---|---|
 Jan OhlssonDante | Dante |
| UUlf HasseltorpTvärsan | Tvärsan |
 Börje AhlstedtDante's Father | Dante's Father |
 Christina SchollinDante's Mother | Dante's Mother |
 Lars LindTvärsan's Father | Tvärsan's Father |
 Meg WestergrenTvärsan's Mother | Tvärsan's Mother |
| JJeanette HellströmGinger, Dante's older Sister | Ginger, Dante's older Sister |
 John HarrysonSuperintendent | Superintendent |
| CCarli TornehaveThe Shark | The Shark |
| KKerstin DahlElsa Dieter | Elsa Dieter |
| LLillemor OhlssonAnnika Nilsson | Annika Nilsson |
 Sten ArdenstamHolmberg | Holmberg |
 Ricky BruchHead Waiter | Head Waiter |
| KKent SjömanKlas Dieter | Klas Dieter |
| JJim SteffeJewel Thief with Hat | Jewel Thief with Hat |
| MMagdalena WiklundJewel Sales Lady | Jewel Sales Lady |
| SSture GustafssonPolice | Police |
 Egil HolmsenPolice | Police |
| RRune HallbergPolice | Police |
 Lasse BerghagenKarate Instructor (uncredited) | Karate Instructor (uncredited) |