Terje Nordby

Pelle Parafins bøljeband has to find a new home after their basement is flooded. Fortunately, their old rivals Randi & Ronny invites them to play at their new restaurant. However, an old ghost haunts the restaurant and the band gets into trouble.

Girls mix a serum in the chemistry lab. The serum was supposed to give them fuller voices so that they could sing in Pelle Parafin's Bøljeband, but instead they stumble upon and invent a truth serum that forces everyone who inhales it to tell the truth.

Pelle Parafin's Wave Band is threatened with eviction from the basement where they rehearse by the cynical businessman Audun Automat, who wants to turn the place into an arcade. The band must fight against Audun Automat, the municipality, and the automat ghosts to keep the basement, while Randi and Ronny must also find a new home.