Once a brilliant neurosurgeon but now a pharmacist in a rural town, Se-ok still performs brain surgeries at night. Se-ok is confronted by Deok-hee, the mentor who had a hand in stripping her of her medical license and ruining her life.

Deok-hee wants Se-ok to operate on him for a tumour in his head, but Se-ok does not want to comply with her mentor's request. Frustrated by his former pupil's reluctance, Deok-hee puts pressure on Se-ok.

Se-ok wants revenge for what Deok-hee did to her and meets Na-nae in the hope of stopping Deok-hee from winning the Ichida trophy, an award he is poised to win for the tenth consecutive year.