Four Types of Civilization

Gazing out across the boundless galaxy, where did we come from? Why are we here? Are there others beyond humanity, and others beyond the stars? Do the four levels of cosmic civilization imagined by Kardashev exist?

If there are four levels of cosmic civilization, how did civilizations more advanced than Earth's come about, and what is their technology like?

Fu Chao, a scientist from a Type II civilization, gets lost in a Type I civilization while conducting an experiment in faster-than-light travel. Then, in a freak accident, he enters a Type III civilization, where he discovers...