The Odd Jobs gang has gone to the mountains to go hunting for matsutake mushrooms. Gintoki is in high spirits, but a hunter named Marinosuke appears before him and warns him to leave the mountain quickly because it's dangerous. But Gintoki and the others don't listen and are intent on finding matsutake mushrooms. Masamune, a giant bear that's being controlled by a space mushroom, appears before the group! Gintoki and the others escape thanks to Marinosuke. They try to fight Masamune to collect a reward. But a mushroom just like the one controlling Masamune is growing out of Gintoki's head!!
Nobody knows where to go back down after they've climbed up the mountain. However...
Nadie sabe cómo bajar después 
de haber escalado la montaña.
Ninguém sabe se vai descer ao subir 
numa montanha. No entanto,