The Japanese Warring States period came to an end with the unification of the country by the Tokugawa family. The ninja group, which played a huge role in the turbulent times of the Warring States period, was banned by the shogunate due to its potential threat. At that time, Nagano Domain suffered from drought for years, starving people everywhere, and was in a state of poverty and ruin. With no news from the previous contacts, Princess Yukihime (played by Aoi Morikawa) of Nagano Domain had to go to Edo in person. The princess and her entourage passed through a certain mountain. It was rumored that there was some kind of terrible monster in the mountain, so the villagers tried their best to dissuade the princess from staying away from the mountain. However, the crisis of the original domain was imminent, and the lord of the domain suddenly passed away, so the princess and her entourage had to take risks. Not long after they entered the mountain, they were attacked by terrible monsters. At the critical moment, the accompanying ninja Denzo (played by Dean Fujioka) rescued the princess. The dangerous journey began. Can the weak princess finally reach Edo? And what exactly is the monster that is hovering around them?