Lim Teng Zui (Gurmit Singh) is the subordinate of Tanya Chew (Fann Wong) who holds a high-ranking position in a government statutory board. Tanya doesn't have high EQ and unintentionally offends two 'Old Guards' Eric and Chee Hong, who have been working in there for many years.

During a VIP visit, due to Zui's incompetence and poor work ethics, the Minister sustains a fall. As per the usual practice in such government bodies, an investigation is carried out to find a scapegoat. Upper Management does the usual 'finger-pointing' and finally it is the lowly Lim Teng Zui, who shoulders the blame alone.

Infuriated, Lim Teng Zui confronts Tanya. Their clash escalates into a car chase and an accident results. Both of them exchange souls.

After the exchange, both of them try ways and means of getting their souls back but nothing works. After many mishaps, they are forced to accept the fact that they cannot get their own bodies back and start to adjust to living in the bodies they find themselves in. Only after they experience life in each other's bodies do they each finally see what they've been blinded to for years, including the fact that Tanya has neglected her mother. They each also appreciate the different difficulties experienced by both the boss and the subordinate.

After taking on Tanya's job, Lim Teng Zui persists in breaking the rules and lands himself in a lot of trouble, he faces punishment and has to recompense for his mistakes.

Eric and Chee Hong, still bearing a grudge against Tanya, sabotage her Event and Promotion (E&P) department. To retaliate against them and to save the department from closure, a repentant Lim Teng Zui inspires the whole department to unite and work together, under Tanya's guidance, to put on a large-scale Job Fair Exhibition, so that they might change the fate of the E&P department.

Tanya spares no effort to make the Job Fair Exhibition a success and steps on many toes, thus incurring the wrath of Eric and Chee Hong. They decide to sabotage the exhibition. On the day of the Exhibition, Tanya and Lim Teng Zui manage to deal with all the obstacles that come their way right up to the final sing-along item on stage, with the Minister. The stage unexpectedly catches fire and all dash about the stage in every direction trying to find an escape route, it's utter chaos; many are trapped.

The film takes a satirical look at the inflexibility of outdated governmental rules and regulations and the rigid mindsets of civil servants who follow rules to a fault, charming and delighting audiences with its humorous and perceptive insights.  (Source: Just Follow Law Official Website)