This cache is a tribute to the Geocacheres Greenshades
Eldest begins as Ajihad, the leader of the rebel Varden force, is ambushed and killed, with Murtagh and Ajihad's other guards assumed dead. At his funeral, Ajihad's daughter Nasuada is elected to command the Varden. The protagonists Eragon and Saphira then decide to travel to the forest Du Weldenvarden to become trained as a Dragon Rider by the elves. Once there, Eragon meets Oromis and his dragon Glaedr, the only dragon and Rider secretly alive besides the antagonist, Galbatorix. Oromis and Glaedr, however, are both crippled, and so cannot fight Galbatorix and must hide instead. Eragon and Saphira are taught the use of logic, magic theory, scholarship, and combat, among other things.
Meanwhile, Nasuada chooses to move the Varden from Tronjheim to Surda, to mount an attack on the Empire. The Varden suffers financial troubles, however, until Nasuada learns that she can create lace with magic, and sell it at extremely low rates. One night when Nasuada is in her room, a character named Elva saves her from an assassination attempt. Elva is enchanted, and locates the assailant, who is killed after unwillingly surrendering information about a subversive group based in Surda called the Black Hand, who is plotting to kill Nasuada. Nasuada later attends a meeting with key figures in Surda's government to discuss a potential upcoming battle against the Empire. They learn that the conflict is coming sooner than they initially suspected, and mobilize forces to attack, as well as sending for help from the dwarves.
In the meantime, Eragon continues his training, but is discouraged when the scar on his back causes him to have seizures multiple times per day. Later, at the ancient elven ceremony, the Agaetí Blödhren, Eragon is altered by a spectral dragon. The changes alter his senses, and enhance his abilities, as well as healing all of his wounds. Reinvigorated, Eragon continues training until he learns that the Empire will soon attack the Varden in Surda. Dismayed, he leaves without completing his training, to aid the Varden in battle.
Meanwhile, Roran is hunted by the Ra'zac in Carvahall. He eventually persuades the entire village to attack the Ra'zac in the night, and succeeds in driving them off. After more conflicts with the village, the Ra'zac manage to kidnap Katrina, Roran's fiancée. Roran then stirs the village to mobilize, departing on a journey to join the Varden in Surda. He leads them to Narda, and then by sea to Teirm. In Teirm, they meet Jeod, who helps them pirate a new vessel from Teirm. Pursued by sloops from the Empire, the vessel manages to escape through a whirlpool, and eventually makes it to Surda, arriving just as the Battle of the Burning Plains is about to begin between Surda and its allies, and the Empire.
When conflict begins, Eragon is able to repel the opposing army using magic. Eventually, a Dragon Rider appears in favor of the Empire. The hostile Dragon Rider kills the dwarf king Hrothgar, and soon begins to fight with Eragon. The Dragon Rider is soon unmasked by Eragon and is revealed to be Murtagh. Murtagh tells Eragon that he was kidnapped and forced into loyalty by Galbatorix after a dragon hatched for him. Murtagh outmatches Eragon, but shows mercy due to their old friendship. Before leaving, Murtagh reveals that Eragon is his brother, and takes Eragon's sword as well. Ultimately, Galbatorix's army is forced to retreat after the arrival of the dwarves and the departure of Murtagh and Thorn. In the end, Eragon and Roran decide that they will seek out Katrina together.