As the fabric of time frays and rewinds, Kim Seokjin is thrust back to April 11 repeatedly. Returning to Korea after a two-year absence, Seokjin is confronted with the memories of his tightly knit high school friends. Once inseparable and each other's guiding light, they drifted into separate melancholic paths. Encountering Kim Namjoon imprisoned for assault unveils a grim reality: Jeon Jungkook and Min Yoongi have passed away; Jung Hoseok suffered a dreadful accident; Park Jimin is nowhere to be found; and Kim Taehyung is stained with his father's blood. Given a chance to journey back in time to rescue his friends, Seokjin grapples with the subtle shifts in reality with each attempt, questioning if a world where all seven can find happiness together exists.