Forces of light and dark have an almighty fight, realise it isn't really getting them anywhere and so call a truce. But - as is the way of such things - the truce is a tentative one and the two sides set about policing each other. Fast-forward to modern-day Moscow where the truce is becoming increasingly shaky due in no small part to a soon to be realised prophecy that will see one side finally triumphant!
Despite the fantastical premise, do not expect this to be a glossy, action-packed, overblown, live-action cartoon. The atmosphere is dark and very grim. The violence and content are unflinching and the whole thing plays out more like a deep, epic horror movie rather than your usual fantasy fare.
That said, the special effects are stunning, with even the sub-titles being incorperated into the cinematography!
It's also important to pay attention as the characters and sub-plots are numerous, but important, not only to this, but also (I imagine) to the rest of the trilogy (yes, TRILOGY).
The epic scale of this movie will (at least in part) be lost on the small-screen but, this movie being as complex as it is, the depth of the story will be far more accessible with subsiquent viewings. And I, for one, will certainly be watching this again!