Police officers investigate dark secrets that link a series of present-day murders with puzzling incidents that took place in a town 28 years ago. Namkoong Min, Kim Seol-hyun, Lee Chung-ah, Yoon Sun-woo, Kim Chang-wan, Kim Won-hae, Yun Gyeung-ho, Lee Sin-young, Choi Dae-chul, Choi Jin-ho, Baik Ji-won, Woo Hyun Added on Netflix 2021-05-21. Youtube Trailer