Silas Vane carries the unconscious Sheriff Elias Miller through the toxic, rising waters of the Blackwood Gulch drainage tunnels. Guided by Rat Connors and accompanied by Mabel Reed, the group discovers the horrific extent of Finch's 'Project Crucible' as the walls begin to glow with radioactive ore. As Finch orders the tunnels flooded to erase the evidence, Silas must navigate the crumbling infrastructure while protecting the incriminating ledger and the dying lawman.