At the Croton Filtration Plant, Walking Boss Morgan Curran and his gang finish prepping the mole for it's third and final tunnel. With work picking up again Morgan rehires Elom, Mikey Bones and Romo, returning his old gang to full strength. Thinking forward to the next job, he needs his gang to begin this final segment without incident, to ensure their future prospects. Over at the East Side Access site in Queens, foreman Tom Kelly oversees a series of precise blasts. But a nagging shoulder injury sends him to the doctor where he is told to stay off of ladders and away from heavy equipment. Ignoring the doctor's advice, Tommy returns to the job the next day to build a protective bulkhead, helping to secure to tunnel against the blast. Back at Croton, the mole gang encounters a string of bad luck, and mining production falls below average. Morgan, concerned that this will tarnish the reputation of his gang, pushes his crew to step in up--or else.