Debt collector Bruce has unusual collection methods, including torture by rock music. Having a bad day, he comes home to find his wife having sex with another man and is then confronted by triad boss Bill who gives him just three days to collect all outstanding debts. Then caught up in a heist by robbers Lung and Keung, he is kidnapped and forced to dig his own grave... By chance, Pui Lau finds Bruce's haunted mobile phone. They enter into an arrangement: Bruce will help Pui seduce pretty Maggie away from her rich boyfriend Royie if Pui helps Bruce punish Bill, Lung and Keung.

Maggie is having a bit of a relationship crisis after her boyfriend Andy returns to Hong Kong from a trip to Thailand. She spied Andy with new girl Sharon at the airport and he seems to have lost all sexual interest in her. Maggie's old habit of sleepwalking returns after ten years, just as Chiang - Andy's boss - is murdered. When she wakes up on another night with a kitchen knife in her hands, she begins to worry that she could be involved in some way. And then the sister of Sharon is also murdered

In ancient times, the Human Emperor, Zhao Ming, petitioned on behalf of the people and sacrificed himself to resist the divine realm. After Zhao Ming's fall, his beloved, Hun Dunzhu, risked her life to save a wisp of his soul, setting up the cycle of reincarnation for eternity. In the distant future, Zhao Ming reincarnated as Xie Xuechen, the leader of the Immortal Alliance, while Hun Dunzhu became the Holy Maiden Mu Xuanling in the Dark Domain. The two finally reunited in the mortal realm but had forgotten their past, becoming adversaries in a "righteous versus evil" struggle. Mu Xuanling saved the heavily injured Xie Xuechen in the Dark Domain and coerced him to travel together in gratitude for saving his life.

前世是重症患者的李长寿意外重生到洪荒世界，化身为一名珍视生命、不沾因果的小小炼气士，为躲避天道预言中的天下大劫，奉行“稳健”之道，一心想上天庭苟活，为此，他稳健操作，不动稳如老狗、一动“石破天惊”，他坚信打打杀杀的时代已经过去，能坑人绝不杀人，能单身绝不恋爱，奈何敌人和美人如潮水般涌来，他一不小心成了运筹帷幄的幕后大佬，卷入多方博弈之中，运作“龙族上天”，甚至那天下大劫也加速到来……
该剧改编自言归正传的同名小说。