Days before their wedding, during their last separate nights of hard-partying singledom, Emma Holden's fiancé has gone missing. Not only has Dan disappeared without a trace, his brother is found beaten and left for dead, and may not wake up from a coma. Without any evidence, suspicion for the attempted murder falls on Dan — but Emma refuses to believe his guilt.

When crime scene photos get splashed across the pages of London tabloids, Emma knows that someone is following her. Watching her. It is an old, familiar feeling, though no less terrifying. A long-hidden family secret seems to unite Emma's troubled past with her dangerous present. As time runs out her trust in her family, her friends — and Dan — faces an ultimate test.