"She's Dead" tells the story of a man who sneaked into the home of a female internet celebrity on a social software and witnessed her death. It is a thriller movie with a tense story and detailed description of the characters' psychology. Registered broker Jung Tae (Byeon Yo-han)'s hobby is to sneak into strangers' homes to spy on their lives. One day, the internet celebrity So-ra (Shin Hye-sun) appeared in front of Jung Tae. So-ra left her house key in Jung Tae's office, and Jung Tae went to her home whenever he had time. One day, Jung Tae went to So-ra's house as usual, but what greeted Jung Tae was So-ra's cold corpse. Jung Tae did not call the police and walked out of So-ra's house in shock. After a few hours, Jung Tae went to So-ra's house again, but the body disappeared without a trace! A few days after this incident, Jung Tae received a red note saying "You did it, right?" To make matters worse, all the evidence pointed to Jung Tae as the culprit, and he was in the worst situation. So can Jung Tae find the real culprit and clear his name?