The killing of Jean Charles de Menezes by officers of the Metropolitan Police Service at Stockwell station on the London Underground after he was wrongly deemed to be one of the fugitives involved in the previous day's failed bombing attempts.

A police surveillance operation ends in tragedy after an innocent tube passenger is shot dead.

As the Met grapples with the fall-out from the shooting, a secretary makes a life-changing decision.

With the police force engulfed in crisis, senior officers are confronted with hard truths.