A game. A death. A nightmare that refuses to end. Deep in the shadowed alpine village of Mittenwald, a group of teenagers gather for a late-night party and play a forbidden summoning game known as "Glassy Glassy." What begins as a cruel joke turns deadly when Gloria — a reluctant participant — dies violently in her sleep after experiencing horrifying nightmares and sleep paralysis. But Gloria does not rest. Something ancient answers the ritual instead: the Alp, a demonic entity from German folklore that feeds on fear, guilt, secrets, and human weakness. As terrifying dreams spread through the village, the survivors begin to realize the nightmare is evolving. The Alp does not merely haunt. It manipulates. It whispers truths. It turns friends against each other. And with every confession, every fracture, and every sleepless night, it grows stronger. As the line between reality and nightmare collapses, five teenagers must uncover the true rules of the entity before it spreads beyond the village forever. But stopping the Alp comes with a terrible cost: Someone must remain behind. Perfect for fans of atmospheric folk horror, psychological terror, nightmare demons, and slow-burning supernatural suspense, this dark horror novella blends German folklore with modern psychological horror in a chilling story about guilt, manipulation, and the terrifying things that wait for us in our sleep.