The 27-year-old Cai Zhixian died in the West and was sent to the wrong underworld by the careless God of Death. He was mistakenly sent to the underworld in different time and space, but no one took him back. He became a lonely ghost and later possessed Xia Qianmo, who died accidentally. On behalf of Qian Mo, he took care of his sister, and was forced to rescue the prison officer's daughter and make her hide her identity. He also rescued a young boy who had business talents and became his right-hand man. Later, he was killed by Shi Gongyu, the enemy of Qian Mo's parents who got his family fortune. After many encounters with him, he resolved the feud and became a good friend. During this period, she also got entangled with the prince (because the prince secretly fell in love with the daughter of the prisoner she rescued, and the prisoner was a victim of the prince's political struggle), but the misunderstanding was later eliminated. Xia Zimu finally stayed with Qin Muzhi, the young boy he rescued.