A hotel concierge and a psychiatrist with traumatic childhoods form a heartfelt bond when they become entangled in a perplexing local murder case.

Seo Hyun-jin, Kim Dong-wook, Yoon Park, Nam Gyu-ri, Kim Ye-won, Han Min, Kang Hoon, Oh Hyun-kyung, Yun Sang-jeong, Lee Hae-yeong, Yun Ji-on, Park Ye-ni, Ji Seung-hyun, Kim Seo-kyung, Baek Hyun-joo, Hwang Seung-eon, Park Sang-nam, Park Ki-deok, Paul Battle, Ji Hye-in