Ahn Eun-young enters the forbidden basement as Hong In-pyo reluctantly trails along. They join hands when a dark secret shakes up the school.

When the bond between two troublemaking students catches Eun-young's eye, In-pyo proposes unconventional ideas to split and keep them apart.

Eun-young and In-pyo get knotty behind closed doors. With Mackenzie’s support, a student settles the score with the basketball team.

Evil floods the school with uncontrollable negative energy. Eun-young reaches her limit and makes a difficult decision with In-pyo by her side.