Jeon Jeongguk has thyroid cancer, he wants to die. Since thyroid cancer is rare in Seoul, he is moving to New Orleans to get more treatment. There, he meets Kim Taehyung, a young saxophonist who has lung cancer.
V, or Taehyung, gets a chance to relive his life in order to fix his relationship with his fellow members of BTS. But there's a twist. He can only live up to six months, after that, he permanently dies. He hopes he can enjoy the time he has before he leaves them for good.