One Monday afternoon, around three o''clock, pond supplies salesman Selwyn Robby arrives home towing the Toogood Aquatics exhibition caravan and orders his like-wife, Imogen ''Ginny'' Dare, to get into the car. He''s taking her on a little holiday, he says. To Wales. So begins their road trip west via ponds, pitstops, and blasts from Selwyn''s past.