Lennie from the pickle factory, who has visions of sailing the canals in a swan boat, unwisely allows Clegg, Truly, Alvin and Billy to help him on his way. But a passing narrowboat puts paid to his dream.

Clegg, Truly and Billy meet up again with Lenny, the former Swan Man of Ilkley, he has heard voices from above so the lads help him in his quest to be a prophet. The two policemen see a mysterious leg, they follow it and it belongs to Howard. Miss Davenport continues her teasing of Barry.

Lenny, heavily-chained, is determined that he has a showbusiness future as an escapologist. Sidekick Cliff is not as enthusiastic.