In a world full of magic, it is considered as a curse. Those who possess cursed magic are dangerous and could cause havoc to society. The government enforced a law to throw all of the cursed users to the bottomless pit called "The Great Abyss." Astra (also known as Marie) was sentenced to be thrown into the abyss and ended up losing all of her memories of her friends and family. Terrified, Astra discovers a village deep below the abyss where abandoned cursed users struggle to survive. With the help of new friends, she slowly learns how to control her cursed magic and uses it to protect the people around her. On the surface, her brother, Charles, joined a rebel group called "Resistance" and their goal is to stop the law that condemned cursed users to the Great Abyss and expose the truth the government had been hiding for centuries.