Your childhood memories are like a fog, no matter how hard you try, you can't access them. Every day you feel like there is something important that your past hides, but all your attempts to remember end in frustration. Then one night, as you drift into a deep sleep, the nightmare begins.

You are in a world of nightmares, you are not alone. Before you, four boys. The first, Subaru, with eyes that seem to contain universes, a calm blue and a flaming red. The second, Ray, always serious and cold. Thoma, smiling and full of life. And lastly, Licht. Every time your eyes meet his, your heart sinks, as if you're seeing someone you lost a long time ago. But how is this possible? You never met him.

The nightmares don't stop there. Appearances from his childhood begin to emerge, fragmented and painful memories. Before you can process any of them, a grotesque creature emerges from the shadows, with hungry eyes and a suffering face, chasing you with fury. In pure desperation, you run, trying to escape. When you feel it will be achieved, you wake up with cold sweat dampening your forehead. It's not the first time this has happened. And, to his terror, every night, at the same time, the bell rings at ten, and the nightmare returns, like an endless cycle.

Decided to understand what is happening, you agree to meet the boys in the real world. And trying to figure out what really happened in your childhood that seems to intertwine with them. You discover that if you die in the nightmare world, you will also die in the real world. One afternoon, during a meeting at a coffee shop to discuss what you are going to do. Subaru and Tomma look at you, Ray interrupted the silence with his calm but serious voice: “These nightmares aren't just projections. They are the key to something that is buried deep within us. Something that needs to be faced... or it will destroy us all.”