PC Cass Rickman calls in sick after over-indulging at a barbeque for the relief the previous night. PC Sam Harker and PC Tony Stamp are called to the Sun Hill Lido swimming pool, where a young girl's body has been found in the water. Harker goes undercover at the pool, where he runs into the miraculously-recovered Rickman. The pair team up to catch a peeping-tom with a digital camera, but Rickman's warrant card is stolen when her locker is broken into. Eventually they discover that the pool's Australian lifeguard Steve Kellerman (who tries to flirt with Rickman) is dealing drugs and that the dead girl died in an accident when she joined he and his friends for a late night pool party.
- Suzanne Maddock as P.C. Rickman
- Matthew Crompton as P.C. Harker
- Trudie Goodwin as Sgt. Ackland
- Colin Tarrant as Insp. Monroe
- Jeff Stewart as P.C. Hollis
- Graham Cole as P.C. Stamp
- Lisa Geoghan as P.C. Page