Wong Boon-kap has recently returned from his studies abroad. Following the orders of his father Tai-ming, Boon-kap goes undercover as a mechanic apprentice in the father's factory to spy on their staff while keeping an eye out for talents. The boot-licking the factory manager Fung Hon-wing and his secretary Cheung Pat-fu respectively enlist their goddaughter Lam Hap-ping and niece Cheung Yuk-lin to join the ranks of the female workers to unveil the identity of the young boss. Ho Chui-wan lands a job at the factory through Lam's connection. Ho's disapproval of the practice of fawning and sycophancy rampant in the factory gains Boon-kap's respect which develops into romance. Tai-ming shatters the heated rumour that the young and promising Hung Yuet-keung is the young boss by announcing the wedding of his son, Boon-kap, to Ho to the huge disappointment of Fung and Cheung.

"A boss convinces his son to work undercover in his factory."