Every Friday, Lilly Daniels goes out to the same club with her friends. One week she sees someone there, someone who looks an awful lot like her. She tries to talk to her but she has disappeared. Little does she know that speaking to the woman will only raise more questions, questions no one is answering. Determined to find out what is going on, Lilly decides she will work it out for herself.
Meanwhile, Laura is getting suspicious. Lilly keeps receiving gifts she can't explain and Laura is becoming increasingly certain that she's having an affair. She has to know the truth and does some digging of her own.
Neither of them realise how big the secrets are. What they find out only makes things more confusing. But they won't give up, not even when their lives are in danger.