Svein's best friend is a fancy rat named Halvorsen who goes missing during a pet contest, leading to chaos with newspapers reporting a rat invasion. To avoid losing both Halvorsen and the competition, Svein must work to keep his parents unaware of the situation.
Svein thinks his grandma's soul is in the process of being swallowed by mysterious aliens, and he mobilizes both his friends and his rat Halvorsen in an attempt to save her.
Maria, an unconventional single mother, finds herself torn between two men, the successful shrink Fredrik and the 22-year-old paraglider Jonas. This all gets very complicated when her ex-husband Lasse returns, demanding full custody of the children.
