All life begins and ends with the Soul; it drives us, motivates us, and brings those we love close. Without the Soul, we would be nothing.
Gakuja Machi, who on Earth knows nothing of the Soul, wants more than anything in the world to live a life full of adventure and thrills. Lately, he's had recurring dreams about a princess and dragon, as he plays the knight in shining armor that saves her from the monster.
One night, after recieving the news that he and his parents will be moving to Silver Side City, a giant utopia of a city, he has a dream of something else...changing his life forever, revealing to him his destiny to become a Trigger Chosen, a person whose soul is of pure light, destined to protect and bring hope to a magical and wondrous world from the forces of evil, wielding a weapon crafted from their own souls, shaped in the form of the users greatest desires, allowing them to unleash their true power, a Grave Trigger.
Gakuja must learn the ways of the Trigger Chosen, find his fellow Chosen companions, and learn how to take his role as leader of the Chosen seriously, while struggling with his urges and desires to throw all caution to the wind and have fun.
Painful memories are like specters tormenting our existence. To face it, we must sometimes make a clean slate of our past and learn to live in the present moment.
Unfortunately, it is not an option for Ishizora, who is suffering from amnesia after a fall in the forest. For him, the only thing that still gives a meaning to his life is a familiar voice that urges him to become stronger. Alone and left to fend for himself in the vast territory of Historia, renowned for its omnipresent wilderness and respect for traditions, he will encounter a young girl who will save his life using a mysterious power. During his quest for information to better understand his world, he will learn about the existence of "Geikas" - groups of people passing down ancestral knowledge from generation to generation. This is how the young Natsuki, met in town, will introduce him to the Shinzu Geika, a reclusive Geika that lives self-sufficiently in the forest. He will make new friends in this loving home and gradually adapt to his new way of life, but how long will these carefree days last? The Shinzuites seems to face their own threats...
Where will his blind quest for strength lead him? Will the specters of the past ultimately prevail over the present? Profound truths and a terrible drama weigh on his future.