Syndrome

A hospital chief has a risky surgery to remove a brain tumour, while an intern takes a stand to save a child who has a brain haemorrhage.

Eun-hee has an unexpected side effect after her brain surgery, while Hae-jo makes a good impression by thinking quickly under pressure.

Yeo-wook asks Sung-joon to perform a standstill operation, Tae-jin makes a huge change at the hospital, and Eun-hee's past with Sung-joon is unveiled.

Sung-joon attempts a standstill operation while under scrutiny, Hae-jo receives a second chance, and Eun-hee has a stirring announcement.

Sung-joon stirs things up at his first department meeting, Eun-hee steals Tae-jin's interview on the Neuromedical Center, and Tae-jin picks a pawn.

Tae-jin uses his brother-in-law's insecurities for his own purposes, Eun-hee is followed after work, and Eun-hyun makes a difficult visit.