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The Vault - Fallout Wiki
Four Leaf fishpacking plant
FourLeafFishpackingPlant Location FO4.png
Worldmap Loc Img 174.png
Map MarkerFour Leaf Fishpacking Plant
QuestsDiamond City Blues
Cell NameFourLeafFishpackingExt
FourLeafFishpacking01 (interior)
ref id0000e130
0003d649 (interior)

Four Leaf fishpacking plant is a landmark of South Boston in 2287.


Before the Great War, the plant was operating on a deficit and was threatened with bankruptcy, partly due to mismanagement and partly because the waste water runoff from the nearby General Atomics factory. In more recent history, the plant has become the site of Marowski's secret drug lab which keeps Goodneighbor with a steady supply of chems.[1]


Four Leaf Fishpacking Plant

The plant consists of a ground floor covered with conveyor belts, and a series of catwalks extending all over. The east end has a stairway leading down under the main floor that contains mostly piping, generators and maintenance areas. To the east is a mag-locked door unlocked by a novice-locked terminal that leads into a store room.

Marowski's chem lab

Marowski's chem lab is on the top floor of the plant, but can only be accessed by either hacking the Master-locked terminal on the wall outside the hidden door, or by tripping the lasers outside the as per Trish's note (that is: the one beside the trailer truck beneath the plant's sign, then the one attached to the stairwell on the south side of the plant, then the one in front of the double door entrance, then the one attached to the trailer truck, and finally the one on top of the roof, down the catwalk on the west side of the building.

The drug lab itself is much more simple than the way to get in. The front two offices contain a total of four chemistry stations. An office off to the east side is covered in mattresses and serves as the chem workers sleeping quarters. A door on the west side leads back into the factory, to a broken catwalk.


Notable loot

  • An issue of Tales of a Junktwon Jerky Vendor is in the basement locker room on the west side of the plant, on a bench.
  • Two fusion cores are throughout the plant: one is in the generator just left of the entrance up the stairs; another is on the shelf in the store room on the ground floor, behind the mag-locked door.
  • A Nuka-Cola Quantum is found in a room at the top of the catwalk in the northwest corner.


Four Leaf fishpacking plant appears only in Fallout 4.


  1. Fallout 4 Vault Dweller's Survival Guide Collector's Edition p.511-512: "[18.01] FOUR LEAF FISHPACKING PLANT
    This plant operated at a loss and was almost ready to shut down in October 2077. This was partly due to mismanagement, but the waste runoff from the nearby General Atomics Factory may have been a factor.
    A local gangster’s secret laboratory helps chems flow through Goodneighbor like water. This secret lab is completely separate from the main plant interior. You can investigate the area during the specified quest (where you can obtain notes to shut off the laser tripwires and open the secret door), or you can try hacking the exterior terminal on the catwalk (Master) to get in."
    (Fallout 4 Vault Dweller's Survival Guide Map)