Faced with complaints and an accident, Lee Hong-jo investigates an ominous temple, coming up against the mysterious — and cursed — Jang Sin-yu.

Now in possession of the enigmatic box, Hong-jo finds that opening it is not as easy as it seems. Sin-yu later asks Hong-jo for a favor.

Amid a budding love triangle, Sin-yu struggles to remember what happened with Hong-jo. A much-awaited reversal spell doesn't go as planned.

The love triangle intensifies as Sin-yu and Kwon Jae-gyeong vie for Hong-jo's attention. An unexpected person begins to make Hong-jo uncomfortable.

Sin-yu makes a decision after remembering his past, making things harder for Hong-jo. As everything falls into place, an evil plot goes into effect.

Hong-jo experiences a vision after Sin-yu rescues her from a dangerous situation. Hong-jo discovers the true reason behind Sin-yu's worsening symptoms.

Even with their relationship solidified, Hong-jo and Sin-yu meet resistance from his father. Hong-jo confronts Yoon Na-yeon about their past.