At age 12, Lasse is a tough guy and a bright one. His life is changed when his mother, pregnant at the time, abandons his beloved father. She takes Lasse with her to live with her new paramour, a dentist as authoritarian as Lasse's Elvis Presley-fan butcher dad was easy-going. The dentist has a daughter, too, and she is a jealous schemer. Lasse tries hard to conform, but can a tiger change its stripes?
| Actor | Role |
|---|---|
| AAnders SchoubyeLasse | Lasse |
 Tommy KenterLasses far | Lasses far |
 Birthe NeumannLasses mor | Lasses mor |
 Paul HüttelHilding, Lasses stedfar | Hilding, Lasses stedfar |
 Laura DrasbækLollo, Hildings datter | Lollo, Hildings datter |
| HHakim Bellman JacobsenGubbi | Gubbi |
| KKristine HornTina | Tina |
 Stig HoffmeyerLærer | Lærer |
 Vibeke HastrupMother of Tina | Mother of Tina |
 Christian PotalivoSchoolboy | Schoolboy |
| DDominik CzamackiSkoleelev | Skoleelev |
 Henrik LarsenSkoleinspektør | Skoleinspektør |