Ever since those Regulators have been bothering his raider brethren, Junders has sought solace surrounded by the ancient dead, cultivating a shrine to a mystical figure from ancient history named "Lincoln." Plunkett spends his time drinking wine, and polishing his spiked dusters.
Junders only appears in the game if you have the Lawbringer perk and he will attack the player's character on sight. If killed Junders Plunkett will have a unique finger on him which can be turned in for the bounty to Sonora Cruz, with 1000 caps paid as reward. The player does not need to kill Plunkett personally to get credit. Plunkett can die of any means and the finger will be on his corpse.