One Shirukan, an elite soldier of the Shirat Empire, came to Earth for Raea's Starfire shard and failed.
Aware of the possibility of another attack, Raea trains to use the shard's power to protect it while preparing to graduate from high school. But she discovers that the Keeper training her has betrayed her trust and now she must decide where her heart belongs. She never imagined that distance from him would mean a universe apart.
After the Shirukan attack, she wakes up to find herself on the Inari homeworld. With the help of allies, she hopes to reach the Crystal Keeper known as Saffir to return home. First, she must elude the thousands of Shirukan between her and freedom.