Despite his wealth, Joo Hong Bin (Lee Dong Wook) 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 (Shin Se Kyung) tries to heal Hong Bin's wounds inside and out, but is this supernatural love damaged beyond repair?