Years before the events of Transition Age, a single city exposed the cracks beneath a carefully engineered future. In the aftermath of a catastrophic failure known as the Great Horizon Fault, the megaregion of Seattle became a test case the world would rather forget.
Following her harrowing escape from a subterranean lab, Iris Vale is thrust into the center of a global conspiracy. Guided by the chilling firsthand account of a surviving mother and son, Iris learns the historic disaster may not have been what everyone was told to believe.
To stop a new and escalating threat from dismantling the world, Iris must venture into Seattle's irradiated ruins to search for answers in a void of quantum entanglement. What she may uncover in the shadows of the fallen city could challenge the future of the Transition Age, forcing everyone to question the mystery of the children who vanished that dark winter.