When Elizabeth Lee receives an ultimatum from her mother to either get married or find a job, the feisty 19-year-old decides to enrol into the police academy. Her best friend, Hani Rahmat, joins her. They meet Tan Siew Lan, the third wife of a towkay, who is haunted by secrets from her past. The three musketeers do not get to do any actual police work. They are forced to prove themselves in the police force before being taken seriously. At the same time, events in the secret society are unravelling at an alarming rate with the death of their leader, Kway Pek. Another gang leader, Dua Jiak, has his eyes set on the empty post. Anti-colonial resentment comes to a climax. Hani finally gets a chance to take part in real police work. Elizabeth is made to contend with her sexist partner, Inspector Kong Say Chong. Siew Lan is faced with the dilemma of whether or not to carry out revenge.