Elias, Ava, and Cross escape Blackthorn Station with the Directorate closing in behind them. Following a mysterious map that seems to change as they travel, they discover Safehouse Kestrel—a hidden facility that has been waiting for Elias for decades.

Inside, Elias begins uncovering disturbing evidence that someone has been watching him throughout his entire life. Cross is forced to confront memories he was made to forget, while Ava finally reveals the truth about her connection to Elias.

But Kestrel holds an even darker secret.

A recording from Dr. Isaac Mercer, the founder of Facility Nine, reveals that the Listening Signal is far more than a mysterious transmission. It is an ancient archive capable of preserving the memories of those the world has forgotten.

And humanity has been fighti ...