When a group of adventurers gets their hands on an ordinary card, no one even realizes that it was planted on them and now their comrades have only two weapons - laughter and determination. Early one summer morning, the modest lazy Kron received a call from his old friend and described in detail the situation about how he got information about the lost laboratory, which is not listed on any maps and does not pass through any departments. Will the friends be able to find an abandoned building, and at the same time, find out the fate of the disappeared people? Ten middle-aged but brave people, not burdened with tuxedos and excessive fashionability, in search of adventure, find themselves in incredible troubles. United by common interests, guided by a false piece of paper and a mocking fate, they will visit parallel worlds and the depths of their own subconscious, synthesized by one of the structures of a secret laboratory into the existing plane of the time continuum. All thrill seekers, not evil and unassuming people, indifferent to acquisitiveness, find themselves trapped and learn that the underground complex is not the end of their misadventures, but only the beginning, and the heroes’ path lies far beyond the boundaries of the original plan. To get out of trouble, they are forced to help Naina, the young and charming leader of the legendary Nagas: snake people living underground and guarding countless treasures. She becomes their companion for a long time. The light flirtation of the main character with the latter, accompanied by humor, will make the rest of the members look at life more simply. Moving along individual branches of the time fractal, adventurers will visit a wide variety of places. The fantastic achievements of ancient civilizations, acquired during a forced operation, will help them fulfill their plans and free Kron and Naina from an unknown illness that overcame them in the underground labyrinths.