The year 2022 wasn't kind to humanity. Due to ecological catastrophes, much of the land was submerged underwater. Many perished, but a portion of the population sought refuge in city-domes constructed by The Constructors. Hundreds of years have passed since those events. Every six months, the "Makers" visit the cities, bringing with them the mythical bathyscaphe filled with the fuel necessary for the city's survival. But this time, the bathyscaphe is empty. You've received a package containing the key to this underwater vessel, and you embark on the "Tour de Constructeur!" Your mission: to save the city from extinction and find a new power source for the generators. Uncover the secrets of the lost city-domes. Learn the rules of the staff and differentiate between similar notes. Explore the hidden corners of the abandoned stations. Scan objects and uncover the mystery of the Constructors' outposts.