From America's Queen of Suspense comes a gripping tale of a young woman trying to unravel the mystery of a family tragedy -- a quest with terrifying repercussions.

It has been ten years since twenty-one-year-old Charles MacKenzie Jr. ("Mack") went missing. A Columbia University senior, about to graduate and already accepted at Duke University Law School, he walked out of his apartment on Manhattan's Upper West Side without a word to his college roommates and has never been seen again. However, he does make one ritual phone call to his mother every year: on Mother's Day. Each time, he assures her he is fine, refuses to answer her frantic questions, then hangs up. Even the death of his father, a corporate lawyer, in the tragedy of 9/11 does not bring him home or break the pattern of his calls.