Seonghwa, Hongjoong, and San are ancient vampires who have shared centuries together, bound by love, blood, and an unbreakable connection. Each has their unique abilities and personality traits, complementing one another. Despite their eternal bond, they face a growing threat: a vampire hunter society that has learned of their existence and wants to destroy them. The story revolves around their fight for survival while exploring the complexities of their relationship. The three must navigate the dangers of both the human world and the supernatural realm, testing their unity. As they grow stronger, they uncover secrets about their origins and the true nature of their bond, which goes deeper than they ever imagined.