UNC: Asari Diplomacy

An asari diplomat asks you to rescue her sister Dahlia from a mercenary group.

Acquisition
Sometime after leaving the Citadel you will receive a communique from Nassana Dantius upon entering a star system. Go back to the Embassy Lounge and speak with her for details.

It is also possible to go directly to Sharjila in the Macedon system before being made aware of the mission, with similar results. Afterward you can still speak with Nassana.

Walkthrough
Head to Sharjila and make for the exclamation point on the map. Kill all the mercenaries in the base and discover the truth about Dahlia.

Head back to the Citadel and meet with Nassana again. With charm or intimidate you can get her to grant you access to 'prototype asari mods' in addition to your payment. It is unconfirmed whether this actually allows access to new items; no new mods appear and mods do not have their respective manufacturers noted anyway.