After ejecting a troublesome child from the swimming pool where he works, Vince is targeted by the local gang, who will stop at nothing in their quest to destroy him. Well - almost nothing.

Vince falls for Stacey, the aqua aerobics instructor at the pool where he works as a lifeguard. Stacey thinks Vince is a bit weird until she sees his medical notes. Meanwhile, Errol has his own problems. He agrees to take part in a swimathon in aid of sick kids even though he can't swim. Vince decides his flatmate needs to conquer his phobia of saying "no".

Errol has become irresistible to the ladies and none of them believes his claims of having a girlfriend. He is also worried about Vince who seems depressed, so he contacts Vince's dad. Does Errol really have a girlfriend? Will Vince's dad come round? Will Vince let him in?