When Seung-min was on his first year at the Academy of Architecture, he met Seo-yeon. She was a musician student, and Seung-min totally fell in love with her. Years have passed, and now he meets Seo-yeon again - she asks him to rebuild her father's old house.

Architecture 101

Saeyoung is a new employee who eventually stands against Leesun, her stubborn team leader. Leesun is upset by Saeyoung's behavior, but she soon learns about ominous stories about Saeyoung. As the stories about Saeyoung are revealed one after another, she becomes a source of fear to Leesun. Saeyoung's stalking-like bullying continues, and Leesun tries to run away from her.