British murder mystery. Chief Inspector Birkett (Ian Hendry) and Sergeant Saunders (Ronald Fraser) are called in to investigate the murder of a glamorous model. They discover that the victim led a chequered life and that her acquaintances, including drug pushers Jordan Barker (Jeremy Brett) and Hammond Barker (Peter Arne), are reluctant to help. Just when the police finally make an arrest, another killing occurs in a seedy Soho jazz cafe. Are the two murders connected?