Ssestar was the leader of the Selay delegation to the Parliament conference of 2364 in order to resolve their feud with the Anticans. Both races wished to join the Federation, but they had to settle their differences before this could be allowed.
Ssestar and his delegation were taken to Parliament aboard the USS Enterprise-D, as were the Anticans. Upon boarding, Ssestar demanded that their quarters be upwind of the Antican so they could not smell them.
While on board, there was great animosity between the two groups. When one of the Enterprise crew was killed, Ssestar was suspected and questioned about the murder. The true culprit was later revealed to be an energy-based lifeform originating from the Beta Renner cloud. (TNG: "Lonely Among Us")