The Fishing Cabins are a special location.
Within the area are three cabins with lootable fridges, one of the cabins will have a fishing pole. A character with a fishing pole can interact with the No Fishing sign at the start of the map beneath the bridge.
Doing so, the interacting character will cast a line.
An option will be shown, prompting the player to wait for a fish. As hours pass, the interacting character will catch a huge fish with a tiny human face.
The Plot Thickens
You will be given three options.
Wish for food
"[Character] wishes for food! She decides to cook the fish. It's very nutritious!"
You will receive +27 food.
Wish for power
"[Character] wishes for power!
The fish does a little wink and jumps back into the water."
The interacting character will then gain stat increases in strength, fitness, shooting and vitality.
Wish for a fancy weapon
The fish drops a special weapon, such as a flamethrower.