David Kim, a widowed father, becomes alarmed when his teenage daughter Margot goes missing. Utilizing technology, he delves into her digital life, combing through social media, emails, and other online artifacts to deduce her whereabouts. As David painstakingly pieces together her activities and interactions, he uncovers troubling secrets about Margot's life that he was previously unaware of. Working in close collaboration with Detective Vick, who is assigned to the case, David’s search rapidly escalates into an intense and desperate quest to locate his daughter.

The investigation leads David to contact Margot’s friends, peers, and acquaintances, but each encounter only deepens the mystery. False leads and dead ends intensify his anxiety while revealing surprising aspects of Margot's character and lifestyle. As he digs deeper, he begins to question how well he truly knew his daughter. The narrative builds relentless tension through the innovative use of technology-mediated storytelling, showcasing a father's unwavering resolve in the face of mounting odds.