Cialis of the Royal Knights of Alzario is ambushed by an evil group of heretical fanatics that call themselves Regalus. Backed into a corner and on the verge of defeat, she has no choice but to form a pact with the spirit named Myuei to fend off the heretical fanatics.

The story begins in Alzario, a proud nation with a long and rich history, which finds itself under attack by an evil group of heretical fanatics that call themselves Regalus, who have wreaked havoc across the land targeting the spirit stones of the world. Cialis, a member of the Royal Knights of Alzario, finds herself caught up in one of these attacks while patrolling near Alzario's spirit stone. Backed into a corner and on the verge of defeat, she hears the voice of the spirit Myuei from the stone, and the two form a pact to overcome the Regalus attack. Though they managed to stave off defeat, they soon learn of the series of tragedies befalling the neighboring nations, and of Regalus' mysterious plot to target the spirit stones. It is up to Cialis and the Royal Knights of Alzario to stop Regalus from seeing their plan come to fruition and spreading evil throughout the lands.