For centuries, the battling forces of light and darkness have kept an uneasy truce. The undercover members of the NIght Watch have formed a supernatural police force, protecting the world against the Dark Ones... the vampires, witches, shape-shifters and sorcerers that wage war in the night. At the same time, the Dark Ones have a Day Watch that in turn polices the forces of light.
The fate of humanity rests in this delicate balance between good and evil but that fate is now in jeopardy. Ancient prophecy foretells that one day a Great One will arrive who can end the battle between light and dark forever. That time has arrived in Moscow but which side will the great one choose?