She just dropped off her child at the bus stop. A panicked stranger calls her phone. Her child has been kidnapped. The stranger then explains that their child has also been kidnapped, by a completely different stranger. The only way to get her child back is to kidnap another child, within 24 hours. Her child will be released only when the next victim's parents kidnap yet another child. And most importantly, the stranger explains, if she don't kidnap a child, or if the next parents don't kidnap a child, her child will be murdered.