Imagine a city where elevators don’t just transport people from floor to floor, but they think and make decisions themselves. They are intelligent, animated and have long been faithful friends of man. Each Elevator has its own character and its own profession: there are calm, serious passenger Elevators, hard-working freight Elevators, high-speed and cheerful courier Elevators, important Elevators for special assignments... It was in such an unusual place that our heroes, the twins Dima, Vitya and Nastya, lived. One day, the guys secretly entered an unfamiliar High-Class Elevator, which brought them to a very strange floor. And this was the beginning of adventures so exciting and dangerous that the heroes could not even dream about them!