Elias, Ava, and Cross finally reach Facility Nine, the mysterious complex at the centre of the Signal's history.

But the facility is not what they expected. Inside its walls, time itself appears to be fractured, with different versions of history existing side by side.

Elias soon encounters something impossible—another version of himself.

As they descend deeper into the facility, they discover the Null Archive, a hidden chamber containing the memories and possibilities of countless alternate timelines.

But the deeper they go, the more Elias begins to question his own identity. If other versions of him exist, which one is real?

And why does the Signal seem to know exactly which Elias will survive?

When the Signal finally speaks directly to him, Elias discovers that it has not be ...