A space exploration vessel brings alien animals and plants from the depths of space, and scientists are exploring this alien life on a space station orbiting Earth. But there, obviously in connection with the newcomers, the first humans begin to fall ill and die. The doctors are powerless, the staff of the space station seems to be lost. What's more, an irresponsible politician who happens to be aboard the station wants to resist all prohibitions and return to Earth. He would take the disease with him ...