When subpostmasters across the nation began noticing significant discrepancies in their financial records, the Post Office accused them of embezzlement and took legal action. Hundreds faced criminal charges, with many ending up behind bars. This led to the destruction of lives, marriages, and reputations. However, these discrepancies were actually caused by flaws in the Post Office’s own IT system, Horizon, a fact the organization consistently denied. For more than two decades, former subpostmaster Alan Bates has been relentlessly pursuing justice for all those wronged by the institution they once trusted. This is his tale.