On 7 July 2005, four bombs killed 52 people and injured over 700 across London's transport network. This film questions the government's account of that day, introduced by David Shayler, a former MI5 counter-intelligence officer who resigned in 1996 and later served prison time under the Official Secrets Act for publishing allegations against his old employer. Made in Bristol, the documentary lays out the discrepancies its makers find in the official timeline, including claims of a controlled explosion reported at a station before the bombings occurred. It also scrutinizes the CCTV footage used to place the alleged bombers at the scene and questions the evidence tying them to the attack. Shayler's own background in intelligence work frames the film's central argument: that the bombings fit a pattern of false-flag operations used to justify security crackdowns. The film does not claim to solve the case; it presents the inconsistencies it has found and asks viewers to weigh them against the version of events given at the time.