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...
Lastly, Number 15...
...وأخيرًا، الرّقم 15
Zum Abschluss Nummer 15 …
Por último, el número 15…
Por último, el número 15…
Pour finir, nº 15.
E, per ultimo, Numero 15...
Por último, o nº 15.
И наконец пятнадцатый...