 Bashir and O Brien are in a laboratory in orbit of T Lani III. They are helping the T Lani and Kellerun to try to destroy dangerous biological weapons called  harvesters . They were used by both species in a devastating war that lasted for a long time. Recently they signed peace and now they want to destroy any reference to the harvesters to ensure they will never be used again. Bashir and O Brien manage to neutralize one of the harvesters and both species are very pleased. They even invite them to a celebration party. When the last harvester is about to be destroyed, suddenly two armed Kellerun enter the laboratory and start shooting everyone. Bashir and O Brien are only barely able to escape, but have nowhere to go. O Brien starts repairing a transmitter. Suddenly he gets very cold. Meanwhile the T Lani and Kellerun ambassador travel to DS9. They bring the news of the passing of Bashir and O Brien in an accident.