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!
I'll just swim naked!
¡Iré a nadar desnuda!
¡Hora de nadar en pelotas!
Nuoterò nuda!
Vou nadar pelada!
Я просто поплаваю голышом!