Treachery, Faith, and the Great River

Odo is lured to a secret meeting site, where he finds himself face to face with Weyoun, the Vorta leader of the enemy Dominion. Weyoun announces that he's decided to defect and, in exchange for asylum, he promises to provide valuable information that could help the Federation win the war. After the two board Odo's runabout, the ship is hailed by the Cardassians. Odo is shocked when the monitor displays Weyoun standing beside Damar.

The Weyoun Odo has taken aboard the runabout is actually a clone known as WV-Six, while the "real" Weyoun — the seventh clone — is still loyal to the Dominion cause. When WV-Six defies Weyoun's order to activate his termination implant, and Odo refuses to turn him over, Damar and Weyoun vow to destroy the Federation ship. But WV-Six doubts the verity of Weyoun's threat — for Odo is a Founder, the race worshipped by the Vorta. Nonetheless, Damar summons the Jem'Hadar, and they besiege the Federation craft with gunfire.

WV-Six informs Odo of the attacking ship's weakness, and Odo destroys it. While awaiting the enemy's next move, WV-Six explains why his people worship Odo's race: the Founders transformed WV-Six's ape-like ancestors into powerful beings. Odo responds by pointing out that the Founders are also responsible for a war that has killed millions. WV-Six reveals a stunning fact: the Founders are dying from a sickness that is spreading rapidly through their ranks.

Weyoun explains that because Odo left his people long ago, he is the only Changeling not infected by the virulent disease. WV-Six expresses his hope that Odo will use the opportunity to build a new, more peaceful Dominion. After Odo hides the runabout inside a frozen comet, four more Jem'Hadar ships attack and blast their way through the icy field.

Odo tries to outrace the ships, but the runabout is subjected to constant pounding. To call off the attackers and save Odo, WV-Six contacts Weyoun and Damar, then activates the termination implant. Before WV-Six dies, he asks for, and receives, Odo's reluctant blessing. Back at the space station, Odo worries about the future: though his people are dying, they are still the enemy. Regardless of the war's winner, Odo is destined to lose.