As a child, Park Shi On was sent to a specialized care center, where he discovered that his autism gave him extraordinary abilities. With an exceptional memory and keen spatial skills, the young prodigy eventually entered pediatric residency, where he developed into a promising surgeon. However, his mental and emotional development seems to have stalled at age 10, which creates incredible conflicts both inside and outside the operating room, especially with the hot-headed surgeon Kim Do Han. Despite sincere and loyal colleagues like Cha Yoon Seo and Han Jin Wook, it is a fierce and competitive adult world. You can’t just tell Shi On to "grow up.".