The school year began as usual - a monotonous bell ringing, a crowd of students pushing through the corridors, teachers trying to maintain order. But for the five high school students who were part of the school newspaper, this year was going to be different. Ben, Kate, Max, Lily and Tom were the editors of the 'High School Echo', the school newspaper that had long been ignored by most students. But that changed when one day they discovered something unusual. During one of their eternal searches for topics for the next issue, they came across an old, dusty cupboard full of archived school documents. Among them, they found a mysterious codex handwritten and sealed with wax. The code was incredibly complicated, filled with symbols and incomprehensible words. It seemed to hide a great mystery. All five decided that they would try to decipher it. They spent every day after school studying the document, trying to discover what the mysterious codex hid. The incomprehensible symbols became increasingly frustrating, but each night's sleep brought new ideas. The secrets of the school began to come to light - unknown corridors, forgotten rooms, secret passages. But one day, when Ben discovered the key to one of the most complicated symbols in the codex, something unexpected happened. The hitherto closed door to the old school tower suddenly opened wide, and from it came the sound of a bell. Inside, something was awakened that no one could have predicted....