The compelling conclusion to The Lightning in the Collied Night and The Loss of What Is Past: In 22nd-century Aotearoa (New Zealand), Earth struggles to recover from the World War of 2057 while the world's chief physicist and her husband grapple with an immeasurable loss. When a seemingly unstoppable threat to Earth emerges, the Māori scientists must overcome their grief and decide whether to violate the most sacred values and beliefs of their people in a desperate attempt to prevent Armageddon.