Everyone said Cassie (Carey Mulligan) was a promising young woman until a mysterious event abruptly derailed her future.  But nothing in Cassie’s life is what it appears to be: she’s wickedly smart, tantalizingly cunning, and she’s living a secret double life by night.  Now, an unexpected encounter is about to give Cassie a chance to right the wrongs of the past in this thrilling and wildly entertaining story.