Lost & Found

The Yorozuya, Gintoki, Shinpachi, and Kagura is going to a job requested by a client. Little did they know, it was a trap to kill them, the Yorozuya. The samurai that wants to kill them was too strong, Shinpachi and Kagura was defeated except Gintoki, who is still standing. He told Shinpachi and Kagura to escaped and told them to never come back. A few days later, Gintoki never came back. Just what happened to Gintoki?