Tony Saitta, a brilliant chief detective, leaves for Toronto on his toughest assignment yet – to find the killer of his sister Louise. The prime suspect is a married doctor with whom she had supposedly been having an affair. Saitta is increasingly forced to face with the truth that his sister led a wild life. Following the trail of a bracelet, he comes across a young blind girl whom the murderer tries to kill. Disguised as a doctor he finally traps the culprit on the roof of the hospital where the wounded blind girl is being looked after…
