The game takes place in a fantasy version of feudal Japan with evil spirits and demons. The game world is based on Japanese myths and legends. Brave brother and sister, Kensei and Ayame, challenge the powerful goddess Amaterasu, who threatens humanity. Samurai Kensei wields a katana in close combat, but cannot jump. The Ayame ninja (kunoichi) is much more agile and attacks from afar. As you progress, you can level up your characters by learning new skills, from slamming the ground and stunning enemies to double jumping to access high platforms.