Private investigator Michael Ryan becomes involved in blackmail, murder and intrigue as he clashes with the Homicide team. The case centres on The Tango Club, a discotheque which is a front for a high class house of prostitution catering to businessmen. The club is also a front for a blackmailing racket as the club's manager surreptitiously takes photos of guests as they cavort with the club's girls, Niki and Val. Ryan is hired by a worried and influential businessman to recover negatives of photographs being used to blackmail him. Ryan's methods are not the most orthodox and he quickly comes into conflict with the Homicide squad when Tango Club manager Billy Maxwell is found dead. As a prime suspect, Ryan has to move fast to find the murderer. Another murder is committed before the case is solved - with Ryan and the Homicide team working in confusion, misunderstanding and mistrust. Notes: Featuring the cast from Ryan. This episode was made after completion of the 39 episode Ryan series pending a decision on whether a second series would go into production. At this time Homicide production was doubled up to make use of both film crews, reverting to normal when the decision was made not to proceed with a second series of Ryan. Pamela Stephenson does not appear as Julie King in this episode as she had resigned following completion of the first series of Ryan, and would not have appeared in a second series if production continued. A reference is made to her character to explain her absence.