There is a vast universe outside of our world. Chief among those was the Lockon Empire. An empire spanning multiple galaxies. An empire that fell apart 500 years ago after it royal family was murdered.

Leon Andrade is down on his luck. He has had to return to his hometown after his life fell apart. While on a walk, Leon falls finds a cave and discovers an ancient craft. Upon making his way in, he discovers and reawakens Anya, princess of the Lockon Empire and the only survivor of the royal family.

Anya's awakening the attention of Count LaVert, the man who killed Anya's family and who now seeks to finish the job. His goal: kill Anya and take her soul to complete the Singularity Shield, a device powered by the royal family's souls to create a black holes at will.

But Leon is not powerless, as Anya gives him a device capable of transforming him into Star Knight, the last hope of Lockon and Earth! As Star Knight, Leon defends Anya's life to protect Earth and the universe.