An educational film about the perils associated with sexually transmitted diseases (STDs). The drama is interspersed with scenes of a medical adviser directly addressing the camera giving advice and information about STDs.

Eric Deacon
as Mick

Victoria Williams
as Jenny Peterson

Martin Skinner
as Colin

Robert Cotton
as Don

Nicholas Young
as Raymond

Peter Vaughan-Clarke
as Robbie

Rula Lenska
as Rita

Richard Mathews
as Mr Ramlin

Rosalind Knight
as Mrs Ramlin

Sue Holderness
as Christine