Treasure of Jamaica Plain is a quest in Fallout 4.
This unmarked quest focuses on one thing: Cracking the secret of Jamaica Plain and the hoard it (supposedly) holds.
- Head to the town hall in Jamaica Plain. Enter the basement. It opens to a room with the janitor's room to the east and a forum room to the north. The adjacent room is a hallway guarded by several dozen scanning laser tripwires, which can be deactivated by swiping the mayor's ID card. One can alternatively avoid the laser tripwires by going through the Master-locked door to a tunnel. The hallway and tunnel both lead to the treasure room.
- Open the door from the terminal (automatic if you took the password from Sal's body). The unmarked quest is completed once you press the button in the corridor to open the room.