John Mannering, the former jewel thief known as 'The Baron' and now a respectable antique dealer in London's Mayfair, was selling a fabulous diamond ring known as the 'Red Eye of Love'. The ring, however, was not wanted by its intended recipient, who only reluctantly placed it on her finger. Could a sixth sense be at work, as the ring is surely associated with death? There is genuine mystery and a bloody mess for 'The Baron' to sort out with all of his usual panache and attention to detail.