Journalist Sang-jin uncovers the existence of the so-called ‘Troll Factory’ while investigating an online public sentiment manipulation story, and is confronted with an unbelievable truth.

Trainee policeman, ‘Sung-min’ and job seeker, ‘Jun-hyeok’ were suspicious about a suicide incident of a girl who lived in the same dormitory, and they will be tracking her SNS account…

Kim Ji-young, an ordinary woman in her 30s, suddenly shows signs of being inhabited by others such as her late mother and older sister, and the stories of the people…