 Martus, an El-Aurian, tries to con a lady but gets arrested by Odo for conning a couple earlier. In his cell he meet Cos, a dying alien with a strange gambling device. Cos tells he had a string of bad luck. After Cos dies, he takes the device. Shortly after he hears the couple decided not to press charges and is released. He tries to sell the thing to Quark, but he is not overly interested. Feeling very lucky decides to become Quark s rival and opens another casino on the Promenade. Meanwhile O Brien has constructed a racquetball court to get some physical exercise. He finds out Dr. Bashir plays it too. He even was captain of the team of his medical school. O Brien is no match for Bashir, much to his frustration. He keeps challenging Bashir. Bashir fears for O Briens health and tries to stop playing.