Why bother learning when you can enlist the aid of a ghostly doctor from the 1950s? Mujin, armed with a mystical scalpel, races out of the emergency room and soon crosses paths with Aclé, a deceased physician. The duo combines Aclé's brainpower with Mujin's fearless spirit to achieve academic excellence while rescuing lives. Unfortunately, their deeds have stirred curiosity among unwanted groups, including criminal organizations and reputable medical experts who remain ignorant of Aclé's involvement. As their fate becomes more uncertain, the twosome must confront the mounting stress of keeping up their deception.