Neville owns a Blackpool fish and chip shop when he is brought the news that his father has just died and left him Littlehampton rock factory. He is now a part-owner of the factory but it is running at a loss and the bank wants its money.

Neville looks for a way to increase sales and decides to have a cross-channel swim to publicise the company. He organises a training session down at the sea but it turns out none of the staff, including Neville, can swim.