Jyugo and the gang are killing time teasing the new guard, Seitarou.
One day, a new inmate is sent to Cell 13. Inmate Number 99, Tsukumo.
He looks and acts like a ninja! Uno, Niko, and Rock are excited to see the real thing.
But as a Japanese, Jyugo does not believe him. 
To convince Jyugo that he’s a true ninja, Tsukumo challenges Jyugo to see who can escape from prison...
The easiest?
الأسهل؟
Einfach?
¿Sencillo?
¿Sencillo?
Ah bon ? D’un autre côté,
c’est le plus difficile à cerner…
Il più facile?
Mais fácil?
Просто?