The year is 20XX. The encounter with extraterrestrial lifeforms has finally happened. It wasn't the visit of the alien civilization that people once dreamed of, but the encounter with a few grains of tiny seeds. The plant has become known as 'μ'. It brought great benefits to human civilization, just as it was reaching the period of extinction. It gave birth to a wide variety of new materials. Those were used for evolution of the microdevices, which have allowed birth of advanced automated AI etc. It has ascended to an indispensable resource for humankind, but before long... It turned into a disaster.