Due to a marriage arranged for the purpose of benefit exchange, Jiang Yuan, an assassin from the Taixuan Building, and Shao Yue, the holy daughter of the Jiuxuan Sect, were ordered to get married. The two initiated an assassination on their wedding night, only to discover that they were both immortal. In order to obtain the secret treasures of the other sect, the Demon Suppressing Bell and the Demon Suppressing Bell, the two turned from mortal enemies into ostensible spouses, feigning harmony. However, the two were unaware that the other was also an alien survivor whose homeland had been destroyed by "Nihility". This pair of fated lovers formed an alliance amidst vigilance and probing, not only to search for the secret treasure formed from the lost spaceship, but also to confront the entire cultivation world that was eyeing them covetously, seeking hope to defeat "Nihility" amidst peril.