In Edo, a city where samurai once thrived with courage and ambition, the arrival of the powerful alien race known as the Amanto shattered those dreams. The former shogunate now operates under foreign rule, and a new law prohibits carrying swords in public. Gintoki Sakata, a peculiar man with silver hair and a habit of carrying a wooden sword, continues to live as a samurai despite the ban. As the leader of Yorozuya, a small business that takes on odd jobs, he often sets out on missions to help others, though his methods are unusual and frequently chaotic. Alongside Shinpachi Shimura, a bespectacled youth training to be a samurai, Kagura, a strong and gluttonous tomboy, and Sadaharu, their enormous pet dog who likes to bite heads, the Yorozuya navigate the many challenges posed by the diverse residents of Edo, from alien nobility to local gang conflicts.