The epic and thrilling story of two parents thrown together to stop their children from committing an unthinkable crime.

A missing daughter. Suspected of plotting a terror attack in the US.

A father arrested. Police storm Heathrow Airport to bring him in for questioning about his daughter.

A terrifying connection. In Florida, a mother discovers a link between her son and the missing girl, fearing they have been radicalised.

Hunted. On the run from the authorities, the two parents are thrown together to find their children before the FBI does and more lives are lost.