The episode opens in Quark's Bar that seems strangely not to be very crowded. We quickly understand the reason when hearing a horrible sound. It is actually Miles O'Brien and Nog doing some conduit repairs. However, the repairs are heavy and O'Brien soon realize he will need an entirely new plasma distribution manifold. Worse, they are of Cardassian making and cannot be replicated. It is then decided to go scavenge manifolds from the abandoned station of Empok Nor. Because of the Cardassian way of planting booby traps everywhere when they leave a place, a Cardassian expert joins the mission to play as the minesweeper: Garak. The rest of the crew comprises O'Brien, Nog and 4 other Starfleet crew-members: Pechetti, Boq'ta, Stolzoff and Amaro. They soon arrive at Empok Nor. However, their presence sets off an old booby trap that put all their lives in danger.