The story is just interesting enough to keep you intrigued, but considering how souls games barely have a story unless you read random hidden trash cans descriptions, this is oscar level story in comparison (the voice acting is also peak).
But probably the best things about Khazan are the boss fights, extremely well done, difficult yet fair. Also, the game doesn't waste your time in getting to enjoy the highlights, as it is structured in missions (same as Nioh), the missions themselves are not confusing mazes filled with frustrating trash mobs and every mission ends with a boss fight.
My wishlist for the devs is to keep adding content post-launch, especially more weapon types as that alone will increase replay value, which is already high. Well worth the wait and the price!