Perusing some of the most major events in history, the Sentinel finds a pattern: nearly all of them have unknowns that should be known. Digging deeper, he finds that seemingly insignificant people just drop off the face of the Earth at exactly the right times to allow these events to occur.

This twisted path leads the Sentinel to discover a conspiracy unlike any other. It's global. It's deep. It has the potential to destroy society as we know it.

It has the potential to destroy the Sentinel.

Will he survive it?

Will we?