Doctors Roz Parker and Joanna Stevens differ in opinion when they see travelling youngster Rich Collins come in with bruises. Believing Rich to have been abused by his obnoxious stepfather Gerry, DI Ken Jackson sets about trying to nail the man. However, when Dangerfield and Joanna team up to help Jackson crack the case, she becomes the victim of a stalker. Believing Gerry Collins to be the guilty party, Jackson puts him on constant surveillance, only to discover that the culprit is a lot closer to home.