The Siberian Trap derives from the Smith Mora Gambit in the Sicilian Defense. White will offer up a pawn sacrifice in the Smith Mora Gambit in exchange for rapid development. The Siberian Trap allows white to do exactly that and at the same time, get his pieces to active squares and ready for a devastating attack.
If white is not careful he will quickly find himself in a world of hurt. His pieces will be developed to great squares but black will be able to use his active knights and cause a lot of problems for white. White will have to choose to either loose his queen or king.
Watch the video below to watch more detailed explanations of the Siberian Trap.