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.
Can you compare it to something I'm more familiar with?
¿Puedes compararla con 
algo que conozca mejor?
Não pode comparar com algo
 mais comum para mim?