A romantic escapade goes horribly wrong when a young couple are involved in a motorbike accident, and the tragic events of the night leave the staff of St Aiden's struggling to heal more than just a broken heart. Dr. Ormerod grows suspicious when one of his patients is uneasy about returning home, but an investigation by Matron soon reveals the reasons for his reluctance. Meanwhile, Ken and Alun face trouble when a plague of rodents looks set to close down the hospital - but is local rogue Claude Greengrass really the best person to ask for advice?