The Ambush on Dargulli represents an assault against Darth Vader. This event occurred concurrently with the Anti-Sith conspiracy orchestrated by Grand Moff Trachta on Coruscant.
Based on whispers of a Jedi Knight active on Dargulli, Vader was drawn to the planet. He left the Imperial-class Star Destroyer Mathayus orbiting the planet, and Vader descended to the surface alone in his TIE Advanced x1.
Advancing through the city where the Jedi was supposedly concealed, the Sith Lord encountered local mercenaries and proclaimed his sole intention was to locate the Jedi. However, he faced an assault and subsequent ambush from a collective of bounty hunters aspiring to notoriety. Amidst this group, Boba Fett, present in a close cantina, chose to assist Vader instead. With Fett's help, Vader vanquished all his assailants. Following this, the bounty hunter cautioned him to promptly depart the city to avert another attack, but they were then approached by the origin of the rumors, a female Dark Side practitioner who desired to become Vader's Sith apprentice. She proposed aiding Vader in deposing the Emperor, but the Dark Lord of the Sith rejected the offer, executing her with his lightsaber.