Hinata and the girls were just hanging out, a day off from important ninja business. AND wouldn't you know it? Hinata learns some sort of new magical ninja technique that supposedly gives you an upgraded body... Or something... I think the details were a bit fuzzy in the scroll or something, and the true function of the technique is to combine ninjas into even STRONGER ninjas! Well that's great an all; maybe next time everybody could be ready for it!