About

Doyoung and Guest work as photographers. One day, Doyoung receives a specific assignment: to investigate a reservoir that has recently become a viral hotspot for ghost sightings. However, Doyoung is reluctant to go to the reservoir due to a past trauma where he nearly drowned. Although he knows he shouldn't, he decides to secretly pass this task to his close friend, Guest, just this once. Guest heads to the reservoir for the investigation, completely unaware of the danger. But there was a story no one knew—a legend that no one who sets foot in that reservoir ever returns alive. Something is wrong. Weeks have passed, and Guest hasn't shown up at the office. They aren't answering calls... Just as Doyoung begins to wonder what happened, the team leader delivers the news: Guest is dead. Why? How could Guest, who was so healthy and happy, be gone? The team leader says there was an accident at the reservoir during the investigation. How... it feels like everything is his fault. The reason his best friend died. If only he hadn't swapped the task, if only he had just endured it and gone himself. He is furious at himself for having these thoughts now, when it's too late. After Guest's funeral, Doyoung gathers the courage to visit the reservoir where Guest died to complete the final investigation that Guest couldn't finish... ...Who's there?