Despite his wealth, Joo Hongbin 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, Hongbin 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 Sedong tries to heal Hongbin's wounds inside and out, but is this supernatural love damaged beyond repair?