On your way to collect the second Leyden Jar in the Fish Market, you will reach Ma Fishface's room. A strange magic seals the door to this room, and it requires a specific item located in a tricky place. To find this item, you should read through the pieces of evidence carefully and also check out your surrounding area, especially when visiting the Cold Storage Room, the same place where you collected the handwheel for the leaking valve. You can find the full guide on opening this door right here!
