When ten-year-old Shawn Thorpe suddenly vanishes on a museum outing, her family descends into turmoil. Her father, Lorne, a doctor, drinks and self-medicates, his increasingly bizarre behaviour driving his wife from the house and thwarting the police investigation led by Kevin Beldon. Is the abductor one of Lorne's colleagues? A member of the local community association? Or...? As the suspects begin to fall by the wayside, Shawn suddenly reappears. She's unharmed. And she refuses to talk. Beldon and Dr. Thorpe, in an improbably alliance, sharpen their investigation to a fine point. But even as they hone in on Shawn's abductor, more children go missing.