Guards rushed to the gates of Porton Down, Britain’s most secure and secretive military research facility. A lone metal bucket sat outside the complex. The staff feared the worst. As men carefully approached it, they realized the object wasn’t ticking. In fact, it appeared harmless, filled with nothing more than soil. To the scientists inside, this was worse than a bomb.Across the country, Margaret Thatcher took to the stage at a conference when another bucket showed up. This was a deliberate attack. A single gram of this soil was enough to take a life. There was only one place in the nation where it could have come from: Base X. But it couldn’t be, no civilian had set foot on the island in over forty years. Only a handful of people even knew of its existence. But with the buckets came a warning: “Fix what you’ve done, or we’ll bring your darkest secret into the light.”