There are three Earths in the parallel universe. The first is Planet X, whose technology is highly advanced. The second is Planet Y, where people are skilled in all kinds of magic. The third, Planet Z, is the Earth we know. It is ordinary in every respect, but its people place extraordinary importance on the bonds between them.
Some extremists on Planet Y collude with certain people on Planet X and use the space-travel technology held by Planet X to reach Planet Z, or Earth, intending to wreak havoc there. In the end, however, peace-loving people from Planets X and Y join forces to subdue them and imprison them on Earth. But the ten-year term is about to expire, and the formation used to hold them has grown dangerously unstable, no longer able to do its job.
In this urgent situation, they find a young man on Earth named Yu Xia, who possesses the talents of all three planets. They hope that through his learning and growth, he will be able to protect Planet Z.
Yu Xia first obtains high-tech products from Planet X, then learns the magic skills of Planet Y. With the help of his friends, he overcomes one challenge after another, gradually uncovering the truth about the world and searching for his own worth.
