List of quests (Zero)/Chapter 4/Raided Heiyue

Raided Heiyue (《黒月》襲撃) is a story quest that occurs during in.

Background
The quest is given by Jona Sacred after speaking with Chief Sergei and Ian Grimwood during Mainz Mayoral Request.

Walkthrough

 * 1) Head to the Harbor District and approach Heiyue Trading Ltd. for a scene.
 * 2) Enter the building and enter Cao's office for a scene.
 * 3) Choose all 3 options, then choose No Further Questions.
 * 4) Head to the Back Alley and approach Revache & Co. for a scene.
 * 5) Head to Garante Jazz Bar and speak with Grace.

Notebook

 * Jona told us that the Heiyue office was raided last night by unknown assailants. Let's go to the Harbor District and see for ourselves.
 * We arrived in front of the office. It appears that Detective Dudley and the First Division are already inside investigating.
 * During our unofficial investigation, we questioned Cao and confirmed our suspicions. The clues point to Revache being behind it.
 * The attackers were subordinates, and it doesn't sound like the underboss, Garcia, was calling the shots.
 * Individual members of Revache should be weaker than those of Heiyue, but they had unusual strength, speed, and endurance. Heiyue members weren't able to match it.
 * Cao said he would give the SSS a chance to get to the bottom of it. If we cannot, they will not hesitate to start their all-out retaliation against Revache.
 * There are multiple mysteries at this time, and Garcia's movements are chief among them. Let's go over there and investigate Revache.
 * Outside in the Back Alley, we ran into Garcia and exchanged a few words. Something is clearly amiss.
 * Grace suddenly appeared and offered to exchange information with us.
 * Let's head into Garante Jazz Bar and hear what she has to say.
 * Grace theorized that Garcia is having trouble controlling his subordinates. She believes the incidents of the past few months were the work of low-ranking members stepping out of line in order to climb the ladder inside Revache.
 * It's probable the incidents downtown and in Mainz were not carried out under Garcia's direction.
 * Don Marconi has been trying to curry favor with Republican Faction members after the incident at the Schwarze Auction. He has also met with the CGF commander many times. It seems he's been hard at work outside of Revache.
 * After talking through the details, something about Revache's behavior is very unusual, especially surrounding the raid. But what is the underlying cause?