Ja-Young (Yeri) and her friends decide to film a video for a YouTube contest that involves prize money. They plan to film a video of a staged supernatural event that involves communicating with the dead, but, while preparing to film in a storage tank of an abandoned building, they try to really talk with the dead by Ja-Young's suggestion. Ja-Young's wish to find clues on her missing older sister, who disappeared when she was a child, leads to unbearable fear.
