Worf is surprised to be paid a visit by Kor, an aging Klingon war hero. Kor admits that his ambition has earned him countless enemies, and that consequently he has been unable to secure the command of a ship. Worf promises to find him a military command, and approaches General Martok with the request — which is angrily refused. Martok explains that years earlier Kor had denied Martok officer status because he was descended from a common house. Undaunted, Worf appoints Kor as a third officer on the Ch'Tang, Martok's flagship, where he is treated with awe by the crew — much to Martok's chagrin.
Back at the space station, Quark overhears Ezri talking to Kira, and mistakenly believes Ezri wants to reunite with Worf. Meanwhile, the animosity between Martok and Kor intensifies as the crew of the Ch'Tang leads a group of Klingon ships on an attack of Trelka V.
In the heat of the battle, both Martok and Worf are knocked unconscious. Kor immediately takes command of the ship. Unfortunately, the aging Klingon becomes delusional, believing he's fighting a battle from the past, and nearly destroys the Ch'Tang. Martok regains consciousness in time to save his ships, and orders Kor off the Bridge.
At the station, Jake urges Quark to tell Ezri that Worf is not the man for her, while Worf, on the ship, confronts Kor over his erratic behavior. He informs Kor that he's no longer up to the challenge of active duty, and removes him from the personnel roster. Although Martok and his officers taunt Kor, Martok admits that he finds no joy in Kor's downfall — however, there's no time to contemplate the sad turn of events when ten Jem'Hadar warships begin pursuing the Klingon vessels.
Knowing that their only hope for escape is to engage the warships in battle using a single Klingon ship as a decoy, Worf prepares to lead an attack that will mean certain death for him. Martok's aide Darok overhears the plan, and relays it to Kor, who intercepts Worf on his way to battle, then tranquilizes him with a hypospray. Kor beams himself aboard the designated ship, where he dies a warrior's death in a fierce battle which inspires the respect of Martok and his crew. For his part, Quark is delighted when he learns that Ezri has no interest in reuniting with Worf after all.