Rain is a vampire slayer who carries werewolf blood, which gives her a particular kind of edge in situations that would kill an ordinary hunter. An island off the coast of Morvania has been overtaken by vampires. At the top of Ransylva Castle waits Carmilla: the noble brood mother of this infestation, and the reason the island is no longer safe. Ascend, fight through what she has set in the way, and end it.