The Katsura’s Faction launches a midair battle against Takasugi to avenge Katsura, who was attacked by Nizo the Butcher. Nizo fights back with Benizakura, a sword-shaped weapon that has become fused with his arm. Meanwhile, Henpeita Takechi and Matako Kijima have captured Kagura. Shinpachi sneaks on board Takasugi's ship and uses the confusion of a cannon shot to successfully save Kagura.  Meanwhile, Gintoki is headed to Takasugi’s ship along with Tetsuko, the younger sister of Tetsuya, the creator of the Benizakura.
It probably is. But it's more likely they found out about the Benizakura.
Puede que sí, pero es más probable que 
hayan descubierto lo de la Benizakura.
Deve ser, mas é mais provável que eles
 tenham descobertos obre a Benizakura.