Mysterious cases take place at an apartment complex which is about to go under reconstruction. Lee Goong-Bok is a real estate agent that works with apartments there. She has a meddlesome type of personality. In Cheol-Ho is a veteran detective.

• Kang Sung-yeon
• Jo Han-sun
• Kim Do-wan
• Park Shin-ah
• Yang Ki-won
• Kim So-min
• Bae Yoon-kyung
• Kim Kyu-seon