Fuedal Japan is turned upside down since the aliens landed and conquered everything; The samurai's don't know what to do since public use of swords has been banned.

Gintoki escapes from Shishimura's surprise attack and meets Kagura. He talks to Katoken while sharing a drink with him.

Following his father's passing, Shinpachi works part-time jobs to maintain the family dojo, enduring ridicule for his old-fashioned lifestyle. He then meets a samurai named Gintoki.

Just two weeks after joining Yorozuya, Shinpachi begins to regret not being able to find the samurai spirit in Gintoki. But just then, a girl jumps out in front of the scooter the two are riding on.

When a delivery job goes wrong and Gintoki's package reveals itself as a bomb, he is mistaken for a terrorist, but an old friend comes to his rescue.

Gintoki and Kagura help an escaped convict evade the police. The man needs only one day to do something special and Gintoki stays with him, intrigued by the man's mission.