Somewhere in the Universe, on the PLANET Z, a miracle happens. A water jet springs up and gives birth to a new life: plants. A desert planet becomes a green planet. Different species cohabit, including liquid and sticky mushrooms. But little by little, the mushrooms invade the green land and destroy the idyllic life. The toxic spores kill the plants and transform the green planet into a mouldy land. After destroying all the vegetation, the future of the mould seems uncertain – a species cannot live without other ones.