A parent's worst nightmare is Grace's deadliest case. Shortly after Kipp Brown and his teenage son, Mungo, arrive at the Amex stadium for their team's biggest-ever football game, Mungo disappears. A short while later Kipp receives a text with a ransom demand and a a terrifying warning: We have your son. If you wish to see him alive again you will not contact the police and you will follow our instructions very carefully. But as a massive, covert manhunt for the boy and his kidnappers begins, Detective Superintendent Roy Grace starts to realize that not all is what it seems.