A quest to the Pleknok system was initiated by several families within the Chiss Ascendancy, with the intention of finding and capturing the criminals responsible for the theft of components belonging to the perilous extraterrestrial weapon called Starflash. The perpetrators transported the stolen weapon fragment to the Pleknok system, where Paataatus military units launched assaults on both the thief's stolen transport and the Chiss warships, namely the Orisson and [Jandalin]((/article/jandalin). This endeavor was considered a personal setback by captain Clarr'os'culry "Roscu" of the Clarr family, who was unsuccessful in recovering the item as instructed by Patriarch Clarr'ivl'exow "Rivlex." This event transpired around 19 BBY.
The Pleknok mission was presented through flashback sequences in the 2021 book Thrawn Ascendancy: Lesser Evil, which concluded Timothy Zahn's Star Wars: The Ascendancy Trilogy.