In the past, Hyrule had become a very advanced civilization, to the point where even monsters did not pose a threat. The citizens of Hyrule decided to use their technology to create tools that would help the hero and princess if the cataclysm were to occur again, however, most of that knowledge was lost throughout history.
Now, ten thousand years later, the prophecy announcing Ganon's return has returned.
In an attempt to defeat the cataclysm, the kingdom of Hyrule has decided to unravel as much information as possible about this technology in order to repeat the history of the legend once again and keep the peace for ten thousand years more, but the cataclysm is raging and it is not willing to wait.