Engineer David King (John Cho) has always been proud of his 16-year-old daughter Margot, who suddenly disappeared. The detective who came to investigate the case suspected that his daughter had run away from home. The father, dissatisfied with this conclusion, started an investigation alone to find the truth. He opened his daughter's laptop and began to look for clues to solve the case using social software. David must follow his daughter's footprints in the virtual world to find her before she disappears...