Criminal investigator Anders Olsen begins to address a case when a bank robber takes at two bank clerks and runs using the cash into Copenhagen's streets. When arrested, he asserts to have perpetrated the offense alone. Some eyewitnesses state the robber did actually have been in a trance, making the case peculiar as well as even more complicated. Olsen realizes that the accused has been with all the Schow Nielsen in prison and begins to suspect that his inmate had hypnotized to perpetrate the offense for him. But could it be possible -- and if that's the case, how do the actual perpetrator be caught? Olsen seeks help from a psychiatrist specialized in hypnosis, together with whom Olsen delves deeper into the sphere of mental manipulation. Absorbed in the investigation, Olsen does not realize that his young wife has been secretly befriended by the mysterious Nielsen. So on the instance that is mysterious rolls him nearer than he could have imagined.