Illegal private detective with the alias Patrick Immelmann (P.I.) is trying to find out more about the past of a new client - a woman called Taj who wants to stay a step ahead of her new employer. Unfortunately Taj is murdered shortly after leaving P.I.'s office and returning to her apartment. Even worse, she left a note with his alias and secret password written on her palm.
Trying to stay out of trouble, P.I. is asked by the victim's sister Raveena to find the murder. She blackmails him threatening to tell the police about the alias and secret identity if he doesn't help her investigating. However, P.I. says it's not the good guys he's worried about.