Star Wars Droids The Adventures of R2-D2 and C-3P0

The droids' new master, Mungo Boabab, plans to open up a new trade route to the Roon system and save his father's Merchant Fleet from financial ruin. While trailing the Rainbow comets over the planet Manga, his ship, Caravel, is high jacked by a tractor beam from the new Ambu light-station in the Cloak of Sith. Once aboard the station, Governor Koong mistakes Mungo for an emissary from Imperial Admiral Screed (an old enemy of Baobab). Koong had invited the Admiral to take a look at his illegal ware, including Mupple delicacies, the valuable explosive Nurgon 14, and the illusive Roonstones.

Mungo and the droids are shot down in their stolen Cloudcar over the planet Roon by Koong's drone pilots. The planet offers them many threats such as mud-men and a giant Shamunaar. Young athlete Auren Yomm comes to their rescue and Mungo decides to help her compete at the Roon Games. When Auren's Umbo racing team members Gee Long and Bix are drugged, Mungo and Threepio fill in for them during the Drainsweeper Race.

Mungo is about return to Manda when Auren presents him with a Roonstone. She leads him to Old Ogger, an old hermit living in a crashed freighter. Ogger is none other than Mungo's long lost uncle, who entrusts Mungo with his kit bag filled with six bags of Roonstones and plenty of clues to find their source. Hot on their trail, Governor Koong and Admiral Screed capture Mungo and friends and put them on a ship to Koong Island.

Governor Koong's plan to use germ warfare on the province of Umboo backfires when he becomes infected with Rooze himself. Healer Nilz Yomm is desperate to find a cure for his wife Bola, but he and his daughter Auren are abducted by Gaff to cure the governor. Mungo and the droids travel to Koong's frozen hideout to rescue the Yomms and manage to solve the last clues to find the source of the Roonstones in the process.