Despite his wealth, Joo Hong-bin is a prickly man harboring a broken heart. But when his emotional pain physically manifests itself as a gruesome ability to sprout knives from his body, Hong-bin quickly realizes that he’s got to start wearing his heart on his sleeve — with all of his newfound scars to prove it. Meanwhile, Son Se-dong tries to heal Hong-bin's wounds inside and out, but is this supernatural love damaged beyond repair?