The shinobi receive a mysterious message delivered by arrow from an unknown, and potentially deadly, assailiant who lurks in the shadows. The letter lures them to an empty spa resort, where they'll begin a trial like they've never faced before. But first, it's time for everyone to have a squirt gun fight in skimpy swimsuits!
the battle to determine the 
strongest shinobi, the Shinobi Masters.
Kämpfe durchführen, um die stärkste
Shinobi zu bestimmen.
la batalla para determinar los shinobis
más fuertes, el Shinovi Master.
la batalla para determinar al shinobi
más fuerte, Shinovi Master.
la battaglia per stabilire la più forte tra le shinobi, lo Shinobi Masters.
uma batalha para determinar as
ninjas mais fortes. As "mestres ninjas".
битву, которая определит
сильнейшего синоби, Мастера синови.