Shen Mingbai, heir to a yin-yang lineage, drives a taxi by day and guides lost souls by night. She accepts a job to escort the meritorious spirit Zhao Qingyun—only for Zhou Zhiming, a Beijing elite 'prince,' and his gang to forcibly crash her ride, desecrate the spirit, and disrupt the sacred passage. Ignoring her stern warnings, they even attempt violence—until the vengeful spirit manifests and exacts retribution.