The Wadi trap the senior staff in a life-size game.
The Wadi, the first formal visitors from the Gamma Quadrant, care only about games, and when their leader Falow catches Quark cheating, he makes Quark play a game of their own. Sisko, Kira, Dax and Bashir then find themselves inside a dangerous maze of puzzles, unaware they are the pieces on Quark's board.
Odo works out what is happening while Quark, frightened, makes choices that put the officers at risk, including sacrificing Bashir from play. After a final ordeal on a crumbling cliff, the officers reappear unharmed in the bar, and the Wadi explain that it was only ever a game.