Eden, an ordinary young man, takes a job in an ancient castle to make a living, only to find out he is the destined soulmate of four werewolf Alpha brothers. Terrified at first, he tries to run away many times. Though the four brothers have totally different personalities, they keep risking their lives to shield Eden from deadly dangers again and again. Gradually, Eden lets go of his fear and sees the loneliness and tenderness hidden beneath their fierce appearances.
Victor, a cruel bounty hunter, develops sonic weapons to wipe out all werewolves in the city. The clan elders refuse to trust humans at first, pushing the whole werewolf group to the brink of extinction. Brave and firm, Eden steps forward to win the clan’s trust. He forms a sacred soul bond with the four brothers and teams up with a vampire ally to sneak into the enemy’s base.
During the fierce battle, everyone sacrifices themselves to protect one another. United as one, they destroy the deadly weapon and crush Victor’s evil plan. After surviving countless life-or-death trials, the werewolf clan fully accepts Eden and abandons old biased rules. The four brothers put aside their wild sides and propose to Eden sincerely. The story ends with a grand wedding, conveying warm themes of mutual salvation, courage, tolerance and loyal companionship.
