The Delgaldon Plains represented a region of flatlands situated on the Outer Rim Territories world of Serenno. While journeying to Serenno to aid the Serennian population against Abyssin soldiers of fortune that had seized control of the planet, including the main city, Jedi Masters Dooku, Sifo-Dyas, Lene Kostana, along with the protocol droid D-4, experienced a crash on the Delgaldon Plains aboard the Truthseeker. This accident resulted in the destruction of D-4. Following the incident, Jenza and Eson journeyed to the crash location using a speeder and encountered the surviving individuals, who then proceeded together towards the Serenno Camp.
The Delgaldon Plains are featured within the canon audio drama Dooku: Jedi Lost, authored by Cavan Scott and made available to the public on April 30th, 2019.