The human population is rapidly declining, being replaced by a new biological species. The scientific world community is trying to prevent a catastrophe, or so, in any case, it is instilled in ordinary people. The world is in panic, and only a young scientist, who has punished himself with the curse of immortality, sees in the epidemic a way to end his endless existence. However, it accidentally turns out that behind all medical developments there are completely different goals hidden, and for the eternal wanderer, life takes on meaning. The story of the tramp continues.