The year is 1986. Fredrik and Nina are synthesizers and live in a small village in Scania. Fredrik is passionate about his music and Nina has photography dreams. Fredrik's synth band is about to play its first gig while his parents are about to ruin everything for him. During the most important weekend in Fredrik's life, everything is put to the test.

A body is found in the water near Liljeholmen. The body belongs to a 39-year-old Danish citizen with a solid criminal record and who was a member of a notorious Danish drug gang. Should the Beck Group get a gang war on their necks? Martin Beck is back to the joy of the entire Beck group. Martin's daughter Inger is not as happy but has to accept her father's decision to start working again.