Don't Log Off

When birthday girl Sam goes missing during her virtual surprise party, her close friends work together to uncover how and why she vanished. Using calls, texts, and social media, they retrace her steps--until, one by one, they fail to return from visits to her apartment. As a dangerous figure from Sam's past emerges, her friends must confront this deranged threat, fight to rescue her, and somehow survive before they, too, disappear.