During a rainy night, a young woman enters a bar. She is broke, but tries to convince a guy to buy her a drink. She is later found unconscious and with a head injury. She introduces herself to the police as Grace Walker, but it is only an alias. Grace is soon identified as the college student Sophie Simmons who mysteriously disappeared three years before. The police realize that "Sophie" and "Grace" are different personalities of the same woman, each with its own set of memories. The SVU has to find out what traumatic event triggered the emergence of separate personalities in the woman, and who had victimized her in the first place.
—Dimos I