[2] The Maddick gang pull off a diamond robbery and murder a police officer investigating their crimes.

One of them is deaf, and equipped with binoculars, can read Pete's lips when he silently mouths what he has discovered.

The gang plans to steal the necklace of prominent socialite Lady Mead at a party she is giving.

Maddick finally lets Pete see him, as he intends to kill the policeman; it is Conway Addison.

Maddick, having decided to retire, tries to gas the whole gang, Pete and Natasha to cover his tracks.

However, Pete manages to break out of the locked room, and the police arrive in time to shoot Conway and arrest the rest of his gang.

TV Guide described it as a "pedestrian picture," and a "totally undistinguished film";[4] whereas Britmovie called it a "vigourous [sic] quota-quickie crime-drama based on David Hume ‘Cardby’ thriller novels".