Charlie is Grace’s best friend, to whom she can trust any secret, so her sudden death splits Grace’s life into “before” and “after.” Charlie's last words haunt her. What did she ask for forgiveness for? What did you want to confess? In search of answers, Grace unexpectedly comes across Anna, who claims that she is Charlie’s sister. Very soon, Anna gains Grace's trust and friendship. And then something strange starts to happen. Grace's things go missing. Her fiancé Dan is acting increasingly suspicious. And, the worst thing is, someone is clearly watching her... Maybe this is just a figment of Grace’s imagination, as Dan and Anna assure her. Or maybe one of them is lying to her? The closer Grace gets to the truth about Charlie's death, the more danger she finds herself in...