The Sun has vanished. The Earth is dead. And for the last humans alive, the troubles have only begun.

When an opaque cosmic cloud invades the solar system, five people flee to a shelter to escape the lethal cold that results. While they wait for the Sun to reappear, a series of disasters pushes them to the brink of annihilation. Survival will not only demand courage, resilience, and ingenuity, it will force the survivors to reinvent every aspect of themselves—their values, their relationships, their very identities.

Still, nothing can prepare them for what’s to come …