Nadia Shevak built the systems that were supposed to keep humanity alive. When the world ended, those systems became the reason she was left to die. In her first life, Nadia was the brilliant engineer behind some of the most advanced survival technology in existence. Her work helped make Haven-9 possible, an elite underground shelter designed to protect its chosen residents from the coming catastrophe. She trusted her business partner with her inventions, believed the people funding her work wanted to save lives, and assumed that warnings about a failing system would be taken seriously. She was wrong on all three counts. Her business partner stole control of her work. Haven-9's leadership buried her warnings. And when Blackfall finally came, the people inside the shelter closed their gates on the woman who knew more about its weaknesses than anyone else. Nadia died outside, betrayed by the very people who had built their future on her brilliance. Then she woke up ninety days before Blackfall. This time, she knows what is coming. She knows which systems will fail, which promises are lies, and which people will do anything to survive. But knowledge alone will not save her. She has no army, no secure shelter, and no guarantee that the future will unfold exactly as she remembers it. So Nadia makes a different choice. With an investor's money tied to dangerous conditions, she begins building a survival project of her own. Her goal is not simply to find somewhere to hide when the world collapses. She intends to create something no single corporation, government, or wealthy survivor can take away from her. Then she discovers Project Meridian. Buried beneath the remains of an abandoned research complex are experimental technologies, hidden infrastructure, and records connecting Haven-9 to a secret climate-intervention programme. The deeper Nadia digs, the more disturbing the truth becomes. Blackfall may not be entirely natural, and the people preparing their private shelters may know far more about the coming disaster than they have ever admitted. But Meridian is not the only thing Nadia's enemies are watching. Soren Bathlew, the engineer with ties to Haven-9 and the man she remembers from the worst night of her first life, has entered her new operation under the guise of protecting her investor's interests. He is observant, infuriatingly capable, and far too interested in what she discovers underground. Nadia has every reason to distrust him, especially when his explanations never quite match the evidence. Yet the more they work together, the harder it becomes to separate the man standing beside her now from the man who failed her before. And Soren is not the only person keeping secrets. Mara Voss, the woman Nadia has begun to trust most, has a connection to Project Meridian that could unravel everything they are building. With the countdown shrinking and powerful people closing in, Nadia must decide how much she can risk on the people around her—and whether protecting her future means becoming the kind of person she once despised. Because survival is only the beginning. Nadia must secure resources, restore failing systems, forge alliances, and build a network of settlements capable of enduring a world that is rapidly becoming unrecognisable. Every alliance comes with a price. Every discovery creates another enemy. And every decision forces her to choose between the people she can save and the future she is determined to protect. Her enemies believe that money, influence, and force will eventually bring her to heel. They are about to learn that Nadia has no intention of rebuilding the world on their terms. When Blackfall arrives, the people who once denied her a place in their shelter will discover that their walls cannot protect them from every consequence of their choices. And the woman they left outside may be the only person capable of keeping them alive. They had ninety days to prepare for the end of the world. Nadia has ninety days to make sure they never hold the power over her again.