After losing her mother and her homeland, Sitara’s despair transforms into determination with the power of knowledge. New possibilities unfold when a family of scholars takes her in, deepening her education. Meanwhile, Genghis Khan’s Mongol Empire conquers nation after nation, nearing Sitara’s new home. After the Fourth Prince of the empire takes her captive, a flame of revenge is ignited.

Kakeru Sorano, a quiet university freshman who avoids others, meets Koharu Fuyutsuki, a blind girl who faces the world with quiet brightness. When she says, “I want to see fireworks someday,” something in Kakeru shifts. As they grow closer through small moments and shared loneliness, he searches for a way to make her wish come true.