Beneath a sky torn by a crimson X, Kira, a girl of secrets, holds the keys to a gate that could free an ancient race—or unleash chaos upon the world. Haunted by her own blood and hunted by shadowy forces, she must choose: open the portal and risk everything, or seal it and bury the truth forever. What lies beyond the gate? And who is the enemy in the shadows—her past, or her future?