Daniel Hunter is a successful London businessman. However, his normal life as a kitchen designer is all about to change. He finds out that his wife has been keeping the strangest of secrets from him. He discovers a deep, long secret tunnel on her farm and investigates further in the greatest of dangers. Soon, in blood and bruises and new pride, he is ready to take exciting mission orders, with little understanding of the consequences.
After his first successful mission, he meets the young mad gang, 'The Thames Slithers'. This gang enjoys many pleasures away from normal society, but their morality forces Daniel’s character to change. Soon there is no turning back for new love, wealth and Thames British glory. Madness on the Thames is a book for all ages because it expands ideas about madness. Dreams, poems and psychic energies are a constant theme in the book, where Hunter's character will soon never be the same again.