At the age of only thirteen, he and his twin sister were originally two little stars in this turbulent world, but they were plunged into an unknown situation of life and death due to the invasion of bandits.

At a critical moment, he was rescued by a kind-hearted master from outside the world and became his only disciple. In this distinctive master-apprentice relationship, his training was full of hardships and surprises.

However, a mysterious giant spirit stone descended from the sky, bringing about unknown changes and also about to face a trial beyond its own limits. How will he reunite with his lost sister? How will that even greater conspiracy hidden beneath the starry sky tug at the threads of all destinies?