A horrible crime happens within the suburbs of Stockholm. Professor Anders Ek is discovered breathless even within the health club of the highschool the place he teaches. A police crew is shipped house to the sufferer, to announce the tragic occasion, however right here the state of affairs is terrifying, all members of the family are lifeless, apart from Josef, the youngest son of the trainer, who’s significantly injured. Medical doctors handle to stabilize him, and now the police have a witness who sadly don’t keep in mind something of what occurred the evening earlier than. Joona Linna police commissioner is tasked with investigating this case. The latter is pressured to hunt the companies of a specialist in hypnosis Erik, to have the ability to make it to recollect the boy went by means of horrible moments and uncover the assassin.