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 mysterious 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.
Back in the US, Agent Shreya Mistry is closing in on the two fugitives. But the more she investigates, the more she realises this case is far from as simple as it seems.