A child was abandoned on the train tracks of Cheongnyangni Station, Seoul. Nothing was known of her before that moment—no certificates, no paperwork. She would grow up to be called Munju by her foster father, then Esther by the nuns at the orphanages, and finally given the name Nana by her French adoptive parents. Those same train tracks are Nana’s first childhood memory, a memory that forms how she views her birth mother, her foster father, and her own sense of self. Now an award-winning playwright in Paris, Nana receives an invitation to Seoul from an amateur filmmaker, who proposes a documentary on her adoption, a film that will revisit the fragmented scenes of her past.