Adopted from South Korea as an infant, Sam grew up in New Jersey with her parents and two brothers. She never imagined she had a sister; nor did Anaïs—who grew up in France and was also adopted from South Korea—until she saw an actress with a face identical to her own in a YouTube video and decided to contact her doppelgänger via social media. A few dubious exchanges turned from mistrust and cynicism to utter shock, as the women discovered more in common than just their looks—and their birth date.