You don’t mention which node the script is attached to. Nor the name of the signal. So I’ll assume the script is attached to your Dungeon-node and you want to connect the signal “fire” it’s emitting to a function called “burn” in your Plantage-scene:
The former connects the “Stop”-signal of the Dungeon-script with the delete-function of the Container-script. The latter connects the “Stop”-signal of the Container-script with the delete-function of the Container-script.