Stein Oscar Magel Paus-Andersen (ST.O.M.P.A.) starts at Langåsen boarding school in Stakavik, where he meets his new friends Bodø, Bergen, Nøtterø and Sørlandet. They find themselves tangled up in troubles with a spider, a fire drill and a swimming contest leading to detention.

Rolf Kirkvaag Jr.
as Stompa

Gisle Straume
as Lektor P.T. Tørrdal

Arne Lie
as Lektor S. Brandt

Ragnhild Michelsen
as Fru Madsen

Carsten Winger
as Rektor C.W. Ulrichsen

Dan Fosse
as Vaktmester Haukås

Knut Eide
as Bodø

Erna Schøyen
as Bodøs bestemor

Thor-Erik Thorbjørnsen
as Bergen

Didrik Arnesen
as Nøtterø