How far would you go to keep a secret? It has been ten years since 21-year-old Mack went missing. A Columbia University senior, he walked out of his room and has not been seen since. Every year he calls his mother on her birthday, on his birthday, and on Mother`s Day. He assures her he is fine, refuses to answer her frenzied questions, then hangs up. Even the death of his father on 9/11 does not bring him home. Mack`s sister, Caroline, has now endured two family tragedies. Determined to solve the mystery surrounding her brother`s disappearance, she sets out to discover the truth. But with it comes a secret that someone will do anything to protect, leading her to a deadly confrontation with an unexpected