Sarah has always been an outcast. She has no parents, no family. She lives on the street and earns money by stealing. One day she sees a young woman on the train platform who looks exactly like her. When the woman commits suicide by jumping in front of the oncoming train, Sarah is in shock. But then she sees an opportunity, a way out of her problems. Sarah assumes the identity of the deceased woman. Suddenly she has a life, a house, money and even a boyfriend. But then she makes a shocking discovery: she and the deceased young woman are clones. Sarah becomes embroiled in a deadly conspiracy where she cannot trust anyone. Are there more like them?