The surgeon Seishiro Tokai (played by Ninomiya Kazuya) who possesses a genius suture technique works in the Affiliated Hospital of Dongseong University School of Medicine, but has no interest in promotion and is a solitary person. He is not only a lonely genius who prides himself on 100% success rate of the operation, but also because of his arrogant personality and his words and deeds, he rubbed against the people around him. Colleagues commented on him as the \”operating room demon\” who \”let patients live and doctors die\”. One day, a new doctor who graduated from another university brought a new type of surgical medical device, which was said to make the surgeon’s skill less important. The hospital intends to use this surgical tool to carry out new surgical operations. Crossing the sea has questions about this kind of medical equipment, and then launched a struggle.