At Oxford they jokingly called themselves The Seven Sinners. Now, 30 years later, they are being murdered - each in the manner of his particular 'sin'. Who is doing it and what is the connection with the twin serpents, the mysterious Emerald Lady and the holy Book of Kor? Holmes and Watson -with the aid of their new friend, Professor Challenger - must race against time and the killer...before one of the victims becomes his brother, Mycroft. Download and start listening now!