Hollywood doing a Russian story with English/American actors is never a good idea, K-19 did absolutely nothing to change my mind. Bigelow's film is a simple succession of vintage submarine thriller clichés, with some terrible accents thrown in to make it appear a bit more Russian. Spoiler alert: the accents didn't make it appear more Russian.
The first Russian atomic-fueled submarine is facing some serious troubles on its way through the North-Atlantic ocean. Captain Zateyev has to keep his sub from exploding, not just to save his entire crew from instant dead, but also to keep a new world war from happening.
Getting past the casting choices was quite a hurdle, but even then this film doesn't have all that much to offer, besides the usual submarine hoopla. There are lots of "tense" moments with people waiting for something to happen/not happen, and since WWIII never happened, it's difficult to make this film truly tense. Not great.