Two years ago, Sara's husband left for the gym one morning...and never came back. His car was found. He wasn't. Unbelievably, the police report said, "No foul play suspected." There were a few sightings over the following months, but little else. Now, on the last day before summer break, her three children go missing from their schools, all at the exact same time. And the note under her windshield wiper asks one simple question: Are you ready to play the game?