One December night, 19-year-old Nacy is found brutally raped and beaten to death in a wooded area in Hjällbo outside Gothenburg. She has been on her way home from a party nearby, but the police initially get no clues after questioning the party-goers. When you later get a tip about one of the partygoers and make a home visit to him, a terrifying connection to a previous violent assault is discovered.

In August 2019, a man was found bleeding heavily after a knife cut in Uppsala. His ex-girlfriend lives in the house. But the police cannot connect the girlfriend or anyone else to the crime. Nor did the fact that the victim himself was subject to criminal investigation lead to any lasting results. But the investigation will take a turn in a very unusual way.