Su Qingwan was originally a saint from the Chilong clan, but she rescued a black cat from a ruined temple on a rainy night, planting the seeds of a love that would last for three hundred generations. She and Mo Li could not escape the fate of falling in love and killing each other, until she discovered that the souls swallowed by the sand of time were actually the souls of her brothers sealed by her own hands. The God-killing sword penetrates time and space, the bronze coffin seals memories, and behind the marriage contract incantation is a shocking scam set by the first Dragon King. When the truth is revealed, she must choose between the destruction of the Time Sand Cage and eternal damnation. This is a love disaster that spans a hundred thousand years, and it is also an eternal love song composed of star sand.