From 1000s of years the battle between Shains(monsters) and Shangens(warriors)
And in earth some kids are playing in a park and suddenly a big shain(8 feet) came and all kids shouted and suddenly a flash came a that shain's head is cutted bya Shangen and that Shangen says "this monsters are also coming to earth now" and a n tokyo a boy was running to attend the school and he's name is Zaki Morozo and he was running fast and he attended to school and he says "fainaly i came" and there is he's friend Sane Suzuki and they both are best friends and in another planet there is so dark and all Shains are there and in a big chair that King of Shain is there and he says "we want to kill all the planets and there is only one plant Shains palent!!" And in a night Zaki was going in a road and suddenly a shain came and it is attacking Zaki and he is douched that attack and a Shangen came and a battel between Shain and shangen but that Shangen is fall down in battle and he says "hee kid run away and save your self and if it comes and attack with this katana and zaki says " no!" And suddenly when Zaki takes that katana and he's brain is suddenly sees a flashback that he's big brother is killing he's parents and suddenly Zaki gets angry and a lighting will came and a full electricity came from Zaki and he says "KAIFU" and he killed that shain and fall down and that Shangen says "that is a legendary jutsu and how he can do it and it will take 100 years to learn".