Song Yuyu, the kind-hearted and sweet owner of a fried rice shop, and Hong Shisan, a ruthless underworld boss, accidentally switch souls after being electrocuted. Forced to take over each other's territories, they end up causing a series of hilarious mishaps through their completely opposite ways of doing things. Meanwhile, they become entangled in a mysterious person's secret plot to seize control of their organization through framing, assassinations, and sowing discord. Song Yuyu cleverly overcomes each crisis and gradually uncovers a shocking truth, ultimately teaching the underworld boss that genuine feelings such as family affection and love are the most important things in life.