The movie is based on the india-pakistan war inside underwater in1971 which was mysterious to the world till today.most of the movie is inside the submarine.this movie shows how the navy works which was interesting and new thing to now.the cast performance was good but the vfx was not that better the first half was little boring with introduction of officers and their characters but second half was interesting as it was the fighting sequence and tactics of war.my conclusion is that its worth to watch the movie