The dark warrior of the business world, Matison Mak (Cheung Tze Yu), caused his mentor to commit suicide and thus left the business world in sadness. However, he learned that his mentor's wife, Maya She (Carina Lau), was now in debt. So he made money by selling "ideas" to businessman Edison Tong (Simon Yip) in order to pay off her debts. But because of his stubborn personality, he refused to become a salaried employee, which led to unstable income. Night and day, he was constantly harassed by debt collector Mimi Lam (Shirley Yeung). The two were always scheming against each other, chasing and fleeing, eventually becoming a pair of loving sparring partners. Until Matison met his half-brother Alan Zu Lian (Terry Kam), which stirred up the painful memories of being abandoned by his mother when he was young. Suddenly, his personality changed drastically, and he began to ruthlessly kill everyone in the An family. Even Mimi, who was usually full of tricks, was at a loss, unable to figure out what Matison was up to.