Sly Cooper was raised by his father, Conner Cooper who taught him about his thieving heritage from the book called the Thievius Raccoonus. On a night he was supposed to keep the book, a group of villains known as the Fiendish Five, lead by Clockwerk killed Conner and kept the book. Sly was sent to an orphanage and met a smart turtle named Bentley and a hippo named Murray.