It's a round of medical emergencies and digestive dilemmas for Sgt Peter Swann, famed in Humberside Police for his everlasting appetite. The sergeant finds himself face to face with a cheese thief who steals to feed his drugs habit; a burglar who won't eat or drink because he has swallowed his loot and refuses to go through the evidential 'motions'; and the teenage boozer who wants to be a copper and is so drunk she can't keep anything down.