I don't typically care for mecha anime's but i saw a video two days ago that sparked my interest in watching this one. it took me a while to find do to not knowing the name at first and later having to realize that it wasnt a series but a movie. this is the story of a world fighting for its survival from monsters called shinobi. the main character of this anime is in search of a weapon called giga road which is rumored to save the world from these monsters. having finished the anime I can say that while it was good, I honestly think the ending ruined it for me. I did not dislike the anime until the end and when it ended I was a little upset. all I can say is that if you like tragic endings then by all means watch this.