The director In-soo visits Busan for casting. The actress' request for script revision extends his stay in Busan. Dong-yeon, whose disease is gradually taking his eyesight away, wanders about every corner of Busan looking for his daughter Hye-ryeon, with vanishing sight and her photo in hand. Hye-ryun was on a motorbike journey to erase her past when In-soo encounters and gets close to her. Accompanying her on the journey, In-soo revises his script with Hye-ryun as the leading character. Dong-yeon's daughter-searching journey and Hye-ryun's past-erasing journey get woven into In-soo's script.