Once again, William Bridge has to put aside his ambitions to become a writer and marry his sweetheart Sally when her father, Sir Henry, is involved in a scandal that threatens to put an end to the family's hopes of getting their son Lancelot married to the daughter of a wealthy American security expert. Foiled in his attempts to get his own back by robbing the Courtney family bank, Foxey Fred and his gang find a new way of retrieving their fortunes by blackmailing Sir Henry; and fearful that his wife may find out, he appeals to William for help. Calling on his Uncle Neil for support, William sets out to reveal the true identity of the crooks staying at Courtney Towers posing as Middle East potentates, despite continued opposition from Sally's step mother, Lady Courtney, and a series of female encounters that are enough to test the trust of even the most faithful admirers.