Sly Cooper is the latest in a long line of master thieves. When he was a kit, a gang called the Fiendish Five killed his family and divided up their book on the art of thieving: the Thievius Raccoonus. Sly must defeat all the members of the gang to recover the book while evading Carmelita Fox, a police officer chasing him around the world to apprehend him.
This game is divided into five worlds, each themed around a particular part of the world and the villain headquartered there. Most worlds are structured as a central hub with entrances to numerous individual levels. Each of the levels has a primary goals which earns you a key. You must collect all the keys in the world to fight the world's boss.