It's a week before the presidential elections when a bomb goes off in an LA shopping mall. In London, armed police storm Heathrow Airport and arrest Sajid Khan. His daughter Aliyah entered the USA with the suicide bomber, and now she's missing, potentially plotting another attack. But then a woman called Carrie turns up at Sajid's door after travelling halfway across the world. She claims Aliyah is with her son Greg, and she knows where they could be.