Carey and Pierson escape into a network of underground tunnels as Pierson's past comes back to haunt him. Unarmed and with no back-up, Carey has no choice but to hear Pierson's story. She is horrified by what Pierson has been through and the extent of the conspiracy that they are now both entangled in.
Simon's real identity is revealed as Carey's allies above ground piece together the truth about Pierson. Carey forges an uneasy alliance to bring down the forces truly responsible for Isaac Turner's murder.
