Having located Jabba the Hutt’s palace, Leia and her friends devise a series of successive plans to rescue her lover, Han Solo.
First the droids enter, under the guise of delivering a threat. They are swiftly captured.
Then, Leia herself enters with Chewbacca as prisoner, disguised as a bounty hunter attempting to collect the bounty on Chewbacca. That night, she sneaks into the chamber where Han is still imprisoned in carbonite, and frees him. She is able to steal a kiss from him, but only barely, before Leia is captured herself, chained to Jabba’s dais, and humiliatingly displayed as a slave.
Finally, Luke enters, hoping to put his developing Jedi powers to good use, but he proves overconfident. Leia is forced to watch as he, too, is defeated by the formidable Jabba the Hutt. But all is not lost. Leia was prepared for these plans to fail. With all of her friends in place, they are able to act in concert, catching Jabba off guard in what he takes to be a moment of victory.
As Han, Luke, and Chewie are taken out to the Pit of Sarlacc to be digested over 1,000 years, Jabba watches from his pleasure barge. R2D2, who has been forced into servitude as a robot waiter, is able to sneak a lightsaber to Luke, and whilst Luke, Han, and Chewie struggle against their captors, Leia takes on Jabba the Hutt himself - strangling the mobster with the chain of her own enslavement.
Having killed Jabba, Leia seizes control of the gun turret, points it at the deck, and destroys the pleasure barge, before escaping with Luke and her friends.
Whilst Leia has been preoccupied with saving Han, the Empire has been building a new Death Star; this one protected by a shield, designed to prevent such attacks as destroyed the first Death Star. The powerful shield is generated from a base on the forest moon of Endor. Leia is to lead a small task force who will be able to sneak into the compound and destroy the shield, enabling the rebel fleet to attack the half-built Death Star while it is vulnerable.
Leia and her friends successfully make it to Endor, but once on the surface, they quickly encounter scout troopers. Fearing discovery, Leia and Luke steal a speeder and chase after the scouts, but they become separated as Luke tackles on scout and Leia takes on the other. In tightly maneuvering to destroy one trooper, Leia is thrown from her speeder and crashes. When she recovers consciousness, Leia finds herself an object of interest for one of the indigenous ewoks. She befriends the ewok, and together they escape the troopers and return to the ewok village.
Leia’s friends are not far behind. They, also, encounter ewoks, but are less successful at making friends. Although C3PO’s strange appearance and skill with languages convinces the ewoks that he is to be revered, the others are captured and are to be roasted alive as part of some form of celebration. Leia tries to explain that these are her friends, but she doesn’t know the language. Fortunately, Luke and C3PO are able to use 3PO’s inflated status to convince the ewoks that killing Leia’s friends would offend him, and they are saved.
Whilst the ewoks continue their celebration (apparently uninhibited by the loss of their feast), Leia notices that Luke is out of sorts and goes to speak with him. He reveals that Darth Vader is his father, and that Leia is his sister, and that she may have the Force, too - which she has long suspected in any case. He explains that his presence is likely to attract Vader’s attention, and she gives her blessing for him to leave.
Leia and friends succeed in attacking and entering the shield generator without Luke, but are captured and led outside. The delay in disabling the shield allows the emperor to reveal that the planet-killer beam is fully operational, and the rebel fleet is now trapped between the Death Star and the imperial fleet. However, with the aid of the ewoks, Leia is able to defeat the imperial troops on the ground and access the bunker again, this time succeeding in blowing it sky high.
With the shield down, the rebels are able to fly into the core of the half-built Death Star and destroy it. Luke, who had been captured by Darth Vader, is barely able to escape in time, and he returns to Endor with Vader’s body.
In the aftermath, Han reveals that he witnessed Leia’s close moment with Luke earlier, and asks whether she loves him. Misunderstanding, Leia replies that she does, but when she realises Han believes that this is romantic love she explains that Luke is her brother, and kisses Han.
Luke reveals that Vader’s last act was to side with his children and destroy the emperor, and Leia and Han join with him to burn Vader’s body in the traditional Jedi manner. Around them, the ewoks and rebels celebrate the destruction of the Empire’s most powerful weapon and the death of the emperor.
(Read A New Hope and The Empire Strikes Back from Leia’s perspective, too. Really, we might rename these films ‘Leia Fights Wars in Space with her Rather Less Competent Friends’ ;-p)