All Swedish newspapers are trumpeting about a series of mysterious murders of girls who were not distinguished by the most righteous behavior during life. Suspicion falls on Lars Johansson, a young eccentric millionaire known in narrow circles for his “special” erotic preferences. A young journalist, having penetrated “undercover” into the world of BDSM, closed to prying eyes, soon realizes with horror that she is crazy about the suspect - she is uncontrollably drawn to him, like a butterfly to a flame...