Seolgi Wu transfers from a small town to Seoul’s prestigious Chaehwa High, aiming for a quiet path to medical school. But everything changes on her first day when she befriends Jay Yu, the school’s top student.
Though Seolgi is excited to have made a friend, keeping up with the fast-paced curriculum proves challenging. Desperate, she sneaks into an academy for extra lessons, only to be caught, risking social isolation. But in a twist, Jay defends her and even introduces her to a secret hideout where they bond over study tips. When they overhear Yeri and Gyeong badmouthing Jay, their friendship deepens, and they soon discover they’re both competing for the same medical school spot—sparking a friendly rivalry.
But beneath the surface, Seolgi, diagnosed as a psychopath at five, and Jay, shaped by a brutal upbringing, both hide dark secrets. What began as a friendly competition soon spirals into a dangerous and brutal war for the title of valedictorian.