Probationary policewoman Mel Draper, seriously hung-over and worse for wear following a night out with her mates, is called to investigate a suspicious death following complaints from a neighbour who notices a foul stench coming from the flat above.

Colin's attempts to stay out of trouble are thwarted when he reverses into a minibus taking a group of girls out on a hen night. Mel is taken aback when she meets her mates queuing up to go into a club and who are obviously uncomfortable about being seen with a policewoman. Mike and Natalie have a narrow escape when they come face to face with a man wielding a sawn-off shotgun.