Legend has it that a dragon imprisoned the princess.
The truth is that the kingdom has exiled its conscience.
Fairy tales are all lies.
In pursuit of the legend, young scholar Xing Li breaks into the forbidden sea. What he found was not a prison inhabited by evil dragons, but a fairyland full of spiritual energy and birds singing. Here, the legendary "evil dragon" is the silent patron saint of the island, the "captured" princess is the priest of light who controls the law, and the "fallen" sword master of the kingdom is the manager of this place of exile.
The residents of the island are all "sinners" who have been erased from the history books of the outside world - "wizards" who burned the plague, "heretic scholars" who challenged dogma, and "traitorous knights" who were unwilling to massacre the city... They were exiled here from their homeland because of their wisdom beyond their times or their good deeds that are unacceptable to the world. Longyu has become a safe haven for all the "mistakes" in the world, and a unique set of contribution rules was born.
However, the calm is about to be broken. The kingdom's fleet has torn through the fog and is approaching the island. They hold high the banner of "justice" and vow to eradicate the hotbed of "evil". Faced with this long-destined crusade, Xingli must make a choice: return to the old world that treats him as an alien, or fight for this new home that accepts him, to protect a truth that has been misinterpreted for thousands of years, and the last spark of civilization.