In the East End slums of London in 1888, a carriage-man named Horace Grott takes a ring from a corpse. Not just any ring, it's the one Plato wrote about, the legendary Ring of Gyges, which makes its wearer vanish. With this power of invisibility, Horace steals food, lives in mansions . . . and commits murder. Within Scotland Yard, Detective Wellington Bentbow works to solve a mystery only he can decipher, reaching conclusions nobody else would believe. Learn why the crimes of Jack the Ripper have never been solved, and ask yourself whether you could resist the awesome and ghastly temptations of Plato's Ring of Gyges . . . Ripper's Ring.