Bridget, six months sober, is rebuilding her life when she becomes the only witness to a professional hit. Seeking refuge, she reunites with her estranged twin Siobhan in New York City, who lives a life of luxury and happiness. However, when Siobhan disappears during a boat trip, Bridget assumes her sister's identity, uncovering dark secrets and realizing she's still in danger.
Bridget has taken over her twin sister's identity and is getting to know her ...