Black Hand (2015)

Jung-woo is a neurosurgeon who works in bioengineering research facility. He is married, but that doesn't keep him from having an affair with Yoo-gyeong, who is a doctor and a colleague at the facility. Caused by a mysterious and terrible accident, Yoo-gyeong looses her hand but Jung-woo reacts quick and saves her life. He uses a new technology to reattach Yoo-gyeong's hand and the young woman recovers soon from the accident. Even Yoo-Gyeong's health seems to improve after the surgery, but also bizarre events beginning to take place around her constantly.