The party turned a corner an encountered a 't-junction' that led through a open door into a room. Turrin entered the room that was empty except for a pile of old rusted junk in the south-east corner.
The decide to investigate down the 'T-junction' and see a room filled with underground vegetation such as mushrooms and fungus. In the farthest corner is a chest...
Turrin decides to check the room for traps.
After the gas clears, the party discuss why they couldn't spot the trap.