In a world where every breath becomes a challenge, 400 years after the catastrophe, oxygen control on Earth has been seized by the corporation “Synthesis,” dividing people by social status. Zoi, a loner with a lifetime assigned second status, works in the forgotten Relics Archive. After the murder of a well-known professor of ecology, Zoi is suddenly the main suspect. August, a Council member with a high ninth status, tries to find out what the professor was looking for on the day of his death. He joins forces with Zoi to solve the crime and prove her innocence. In the process, they uncover not only hidden secrets of the past, but also a dangerous secret of “Synthesis” that threatens many lives. This unique interactive detective-puzzle invites the reader to investigate the case alongside the heroes and solve complex puzzles in order to identify the culprit.