Long ago, during the Edo period, those chosen to become ninja train in secrecy from youth, living in an isolated village to become a secret agent for the shogun. Here, a young girl is training to become such an agent; her name: Ran Sagajo. Along with her talking ninja squirrel companion Sasuke, she has begun a trip to Edo to continue her training.

Long ago, during the Edo period, those chosen to become ninja train in secrecy from youth, living in an isolated village to become a secret agent for the shogun. Here, a young girl is training to become such an agent; her name: Ran Sagajo. Along with her talking ninja squirrel companion Sasuke, she has begun a trip to Edo to continue her training.