Lorraine Simpson is a red-headed young teenager who has just been released from borstal after serving a sentence for arson. Why has she kept a newspaper cutting which announces Ken's transition from fireman to private detective? Fiona Harper, a guest at a nearby hotel, wants Ken to get evidence that her husband, Dennis, is having an affair. She tells him a sob-story about how he has moved his girlfriend into their house after kicking her out in to the street with only the clothes she is wearing. Ken, who can never resist a pretty damsel in distress, falls for this story hook, line and sinker. In fact ""Fiona"" is none other than Lorraine Simpson, who works at the hotel as a chambermaid. But it is a long time before Ken discovers this! Ken watches the Harpers' house and sees Harper with his ""girlfriend"" (who is really his wife, Sue). He agrees to help ""Fiona"" break into the house while the Harpers are out so she can reclaim her possessions. While there, she fakes evidence of a burglary an