The game takes place on a past earth, though obviosly, most of the events that take place are fictional. There are however many real world areas such as the Great Wall of China and the Egyptian pyramids.
There are a total of three playable characters in the game who consist of Will, Freedan and Shadow. All of the playable characters have special abilities, and all are required in order to beat the game. Certain obstacles aren't passable without a certain character, and obviously some have strengths over others.