Two centuries back, the Grim Reaper realized that collecting souls could offer him perpetual existence. Driven by his greed for immortality, he engineered Larvae, vicious monsters that devoured human souls indiscriminately and dispatched them across the planet. In a bid to vanquish these dangerous creatures, Lemuria, the Grim Reaper's sister, founded the Argent Cavaliers and the Lemuria sect.
As a child, Cyan, a knight of the Argent Cavaliers, pledged to shield Lenette Lemuria, the priestess' granddaughter of the Lemuria sect. So when an evil entity threatens Lenette, Cyan, consumed with the need to protect her, is lured into an unfavorable pact with the Grim Reaper. Despite being stripped of his humanity, Cyan remains resolute in safeguarding Lenette from any harm and abandons everything to team up with Jade Lemuria, a Larvae. With an unshakable conviction, Cyan and Jade embark on a mission to shield their loved ones by wiping out the Grim Reaper once and for all.
