Lin Yan and Tang Lan accidentally fell into a mysterious cave during their journey, and after touching a boulder engraved with strange runes, they were drawn into a dangerous world of infinite copies. The crescent moon curse mark has been left on the two men's wrists since then. Only by clearing twelve deadly dungeons can the curse be lifted.
Lin Yan thinks differently than ordinary people, has a mysterious background, and is calm and taciturn; Tang Lan seems to be careless, talkative and weak, but he can always save Lin Yan in desperate situations. From gloomy secret rooms, ancient houses in deserted villages, to abandoned hospitals and radiation factories, the dungeons are extremely dangerous, showing the distortion of human nature, and there are even more unscrupulous capitalist players who are eyeing them.
From being forced to go together at the beginning, to Tang Lan's helpless companionship, to relying on each other and sharing life and death, the two gradually became more and more bonded through each terrifying test. After clearing the level, they temporarily returned to reality and followed the runes to guide them to the next desperate situation.
No one knows that Lin Yan's life experience is closely related to this weird game and mysterious runes. At the end of the twelve dungeons, the fate was decided. The two were deeply in love, but it ended in tragedy, leaving only one endless regret.
