For billions of years, an advanced alien warrior race called the Hexan have governed the universe with an iron fist. Led by all powerful Lord Vanth, the Hexan destroy and create planets without mercy save for a select few planets he deems worthy. Assigned to these planets are elite Hexan guardians, tasked with preserving the balance of life within. Thanatos, one such guardian, has watched over Earth since its beginning billions of years ago. Until one day Lord Vanth decides to destroy and recreate the universe out of a growing hatred of Earth and its inhabitants. Sworn to protect Earth and all living things, Thanatos with the aid of an unlikely human ally, Morana, fights his own kind to save Earth and the universe from ultimate destruction.