Where Trackers fear to tread.

Time is running out for Amos Morgan and Aubrey Carter. Their troubled alliance with a cadre of renegade Hoarders — key to gaining access into the Enclave — teeters on a razor's edge. Years of suspicion and prejudice, on both sides, wars against the need to present a united front.

The dissidents, Mateo and Megan, claim to hold the key, but can anyone be sure whose side they're on?

Life inside the Cascadia Enclave is fast deteriorating into chaos, covertly manipulated by the shadowy Givers and their power-hungry Hoarder accomplices. In a matter of days — or less — the Givers are poised to unleash an army of Trackers on Cascadia's unsuspecting populace.

Earth's fate hangs in the balance, leaving the Runners with one last, desperate option ... dance with the Scorpion.