A man, who is an autistic savant, aspires to become a paediatrician. He overcomes societal discrimination and uses his exceptional abilities to achieve his dreams.
Shi-on confronts his first medical emergency before he even arrives at the hospital, and director Choi lays it all on the line for the new doctor.
Shi-on creates havoc in the OR when he demands that a patient undergo emergency surgery, forcing Do-han to perform two operations at once.
Shi-on's erratic behavior troubles Do-han and causes the rest of the pediatric surgery department to turn their backs on him.
As Shi-on's reputation for awkwardness spreads, hospital staff and patients alike spurn him. Meanwhile, Yoon-seo performs surgery for the first time.
Do-han scolds Yoon-seo for becoming more and more like Shi-on, and the staff treats a girl for a malady that may be linked to a dog farm.
While the pediatric surgery department deals with financial difficulties, Shi-on makes a communication breakthrough with a troubled young patient.
Do-han voices a complaint on behalf of the pediatric surgery department, and Shi-on unjustly gets the blame for a mistake made with a patient.
The pediatric surgery department finally throws a welcome party for Shi-on, and Shi-on discovers he has feelings for Yoon-seo.
Shi-on strenuously objects when he finds out that Do-han has plans to transfer him to the diagnostic medicine department.
Now an integral part of the team, Shi-on and his pediatric surgery colleagues must care for a pregnant woman whose unborn child has a tumor.
While Shi-on deals with guilt over his brother's death, the department unites to save an expectant mother whose baby is afflicted by a tumor.
Now training under Do-han to become a full-on surgeon, Shi-on tries to impress Yoon-seo -- but gets his pride wounded instead.
The trauma of unexpectedly seeing his father incapacitates Shi-on just when children involved in a bus accident need his urgent care.
When things get a little too complicated between Shi-on and Yoon-seo, In-hae opens up to Shi-on about her own feelings for him.
Shi-on takes a courageous stand against his father and earns a renewed respect among his pediatric surgery department colleagues.
Shi-on and Chae-gyeong grow closer, which stirs mixed feelings in Yoon-seo. Meanwhile, the team treats a child flown in all the way from Boston.
Do-han scolds the surgical team when In-hae returns to the hospital in a more critical state, and Do-han nearly collapses before an important surgery.
Shi-on discovers that his ailing father's health is rapidly deteriorating, and Yoon-seo discovers that her feelings for Shi-on are growing.
The pediatric surgery department stages a performance of "Peter Pan" for the kids, and Do-han elbows his way into In-hae's surgery.
Shi-on and Yoon-seo face backlash over their relationship, and the hospital finally agrees to take on Shi-on as a full-time doctor.
