Reformed hacker Diana Highsmith hasn't left her house in over a year . . .

. . . not since she watched the man she loved fall to his death in the Swiss mountains. Now a grief-stricken recluse, she runs a thriving Internet security company from her home-meeting with clients in OtherWorld, an online virtual reality platform where she lives as her avatar, Nadia. The only two people Diana has seen live in the past twelve months are her sister, Ashley, and her UPS delivery guy.

But when Ashley vanishes, Diana is forced to do the unthinkable: to brave both the outside and her own personal demons to find her missing sister. As one shaky step leads to another, Diana finds that the trail she is following is fraught with peril for her and her sister both-as she uncovers a frightening web of deceit and betrayal that stretches from the virtual world into real life.