Imagine a huge, vast campus, filled with impressive buildings, where ambitious students eagerly studying inside. But there is a secret lies beneath this prestigious school - a mysterious cookie deal among the students. With just one bite, students can see their dreams coming true vividly. Soo-young had no clue that such a cookie exists, nor did she know that her only sister gets caught in the case at school. When a student fall into a danger after eating this cookie, Soo-young jumps into school to save her sister. But as she digs deeper into the secret, deadly consequences await.