This trophy is for completing the final quest of the Blacklake District adventure zone (lvl 4-9). This questline actually starts in the Protector's Enclave and leads into Blacklake. The quests are as follows:
- The Theft of the Crown (PE)
- Finding Honor (PE)
- The Trail of the Crown (PE-BL)
- Seeking a Suspect
- The Dead Rats
- Hot on the Trail
- Close to the Crown
- Cornering Karzov
There are some optional quests in between, but these are the required ones. Once you collect your reward from the chest at the end of "Cornering Karzov" the trophy will unlock.