Archive footage, chilling reenactments and exclusive interviews shed new light on a tragedy — and two brothers — that suspended a city in terror.

Whip-smart general practitioner Dr. Mona Harcourt lives in London with her political lobbyist husband Guy and her family. When a bomb goes off in London on the same day that her brother, Dr. Kareem Shirani, is abducted in Pakistan, Mona's charmed life is shaken to its core.