During the Japanese colonial era, roughly 400 Korean people, who were forced onto Battleship Island ("Hashima Island") to mine for coal, attempt to escape.

An offer to buy her property brings elderly Kim Sun-yi back to the country cottage she briefly lived in during eventful times in her youth. With her granddaughter by her side, Sun-yi recalls meeting Cheol-su, not only a feral orphan from Korean war days but a mute boy genetically spliced with wolf DNA by a rogue scientist, now deceased. She effectively tames the unsocialized lad through dog obedience training, and he soon becomes more than a loyal companion, protecting her from the rude advances of her late father's business partner's ne'er-do-well, spoiled, self-centered son, Ji-tae, who fully expects Sun-yi to marry him someday. He would claim her as his own sooner than that if not for Cheol-su, who transforms into an unbeatable werewolf anytime someone threatens a member of his pack, leading Ji-tae to work towards a permanent solution to this problem. Written by statmanjeff