PCs Gayle and Knight try to help a young mother who is being threatened by a local mechanic, but she is too frightened to co-operate. Sgt Stone is determined to prove to his estranged mother that his late father was guilty of raping a probationer twenty years before.

Supt Meadows is determined to secure a confession to murder, but Insp Smith and DC Dasari are unable to persuade the gang-rape victim to co-operate with the investigation.