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When Ella overhears two handsome guys flirting with two girls on the train, she doesn't care - until she realizes they've just been released from prison. Her maternal instincts put her on high alert. When she wakes up the next day, she discovers that one of the girls - the beautiful Anna - is missing. A year later, Anna's whereabouts are still unknown. Ella feels guilty about not being able to help the girls, but she's not the only one who can't forget it. Threatening letters were sent to her that left her fearing for her life. Someone knows where Anna is but refuses to say it. They are watching Ella...