The Substitute

Where the story begins.

Depicts the story of a high-achieving, low-income student who takes the College Scholastic Ability Test (CSAT) for another person to avoid blackmail. Children are placed on an exam stage where they risk falling behind in life if they do not complete the CSAT safely. To obtain the "score" that will determine their future, a survival CSAT war unfolds thrillingly with betrayals and tricks everywhere. It is expected to expose the dark side of entrance exams unflinchingly through the "unfair" children who search for the correct answer amid extreme dilemmas.