share time: 2025-11-20 06:00:46
Modern office worker Lin Yuan travels back in time after an all-nighter, only to be trapped in the mausoleum of deposed crown prince Xiao Jing. A "Thousand-Year Sign-In System" binds him—he must sign in daily to survive, or be devoured by the mausoleum's yin energy. Over a millennium, he uncovers Xiao Jing's injustice: the wise prince was framed for treason by his brother, leading to his family's execution and his mausoleum being sealed in a barren mountain. In the 21st century, archaeology intern Su Xiaotang leads a team to the mausoleum, and Lin Yuan's final sign-in unlocks the ultimate reward: returning to three days before Xiao Jing's murder. But he discovers Su Xiaotang is the reincarnation of Xiao Jing's former maid, and the brother who framed Xiao Jing has become a real estate tycoon trying to destroy Xiao Jing's reputation. Lin Yuan must save Xiao Jing, stop the tycoon's plot, and face his feelings for Su Xiaotang—should he stay in the past to clear Xiao Jing's name, or return to the present with Su Xiaotang?
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