In the fall of 2018, a woman claims to the police that three men have murdered and dismembered an acquaintance of hers. But when police technicians investigate the apartment where it all allegedly happened, they find no traces.

Three unknown men break into an apartment in Sollentuna, Stockholm, and slit the throat of one of the residents. A shocked eyewitness is left behind. Thus begins a murder case that eludes the police in Stockholm in the fall of 2023. Who are the three men? Is the eyewitness actually involved? And why is a seemingly innocent family man murdered? The questions are many and a massive and intricate investigation is launched to find the murderer.