Do-gyeong jumped in to save his student Jiyong from drowning. After the two pass away, Myeongji, Do-gyeong's wife, and Jieun, Jiyong's sister, are left alone in the world, having to cope with the loss of their loved ones. Myeongji travels to Warsaw, Poland, to avoid her harsh reality. She meets an old friend and hides her husband's death as if trying to reject the tragedy....
In the midst of summer, Alex, a successful influencer, invites a few friends to her small isolated country house. One evening, after streaming a live video, they are visited by a particularly persistent stalker - The begining of a dreadful night they'll never forget....
