Black Hand (2015)
Jung-woo (Kim Seong-soo), a neurosurgeon who is drawing attention for the world's first bioengineering research and development. Next to him is Yoo-kyung (Han Go-eun), a lover and colleague who comforts and protects him, who is tired of endlessly repeated research.
Then, one day, a mysterious accident occurs to Yu-Kyung. Yoo-kyung, who is in the worst situation as a doctor who amputates her hand, but with Jung-woo's quick judgment and wit, the hand joint operation is successfully completed. While they are slowly recovering from the surgery, bizarre and incomprehensible events begin to occur around them...