The Korean adoptee Mia travels from Germany to Seoul to reunite with her birth mother, Sun-Ok — but a DNA test reveals a shocking twist: her adoption records were forged, and it's not her, but Clémence, a French filmmaker who was also adopted, who is Sun-Ok's real daughter. Mia and Clémence, two women with the same origins but completely different lives, set out together to uncover the truth about Mia's identity and a mysterious connection that runs deeper than blood.