Imagine a world where the legendary Shiroyasha never came to be. Edo is plunged into turmoil by an unknown force. In this altered future, Sakata Gintoki finds himself in a reality where he no longer exists. What fate has befallen the Yorozuya? As a specter from the past, Gintoki must once more shoulder the responsibility to rescue his companions. He faces the ultimate challenge, which could be the last mission for the Yorozuya.