Ren woke up without memory, without a past, and without any hope for a bright future. Deprived of everything, he found himself under the Dome - a mysterious gigantic structure that became the last cradle of humanity, exterminated by the shadows. Under the tutelage of the swordsman Ryu, Ren joined the army of swordsmen defending the Dome from the invasion of demons from outside, and he even managed to take a place of honor among the defenders, becoming a recognized master of the blade. One day, a mysterious power awakened in him, which became both a gift and a curse at the same time. Ren fell victim to government intrigue, and having been exiled, he wanted to get to the truth, to find out who controlled the dome, and what demons actually inhabited the planet.