Nishijima Kana, an ordinary college student who lives a peaceful life, feels something is off about a mysterious presence floating around her house. Late that same night, a young man sees a suspicious woman in red clothes through the window of a laundromat and starts receiving mails from an unknown sender one after another. This is the story of a week that depicts various terrifying experiences that threaten the lives of unfortunate men and women. This is a hitokowa entertainment packed with "trauma" that may come to your daily life tomorrow, such as "a smart speaker that starts talking in an empty living room," "a mysterious Boston bag found under an overpass," "a mysterious noise that suddenly starts to be heard," "a familiar scene from an unknown woman's SNS broadcast," and "a mysterious letter that starts to arrive in the mailbox."