Madison and Piper are identical twins, mirror images - on the outside. But one sister will stop at nothing to succeed, even if it means betraying her twin. A major perk of having someone look exactly like you is swapping lives when your weakness is your sister’s strength. Studious Piper aces Madison’s Biology final, and flawless Madison poses for Piper’s senior pictures. But as they grow older, the stakes of getting caught increase. Piper has never failed her sister until now, and Madison wonders if her twin intentionally tanked the interview. As Madison questions her sister’s loyalty, a wedge causes the girls to drift apart. Before they can reconcile, a fatal accident occurs and leaves everyone wondering who survived.