The show chronicled the lives, loves and careers of two female officers, and the men around them, as they adapted to this change.

The success of the first series, and the popularity of its cast and characters led to the subsequent sequels, the show being used as a cash cow and ratings draw. However the strong, independent women characters, which had made the series popular, became increasingly sidelined, and the show lost its uniqueness towards the third series. To maintain interest the show began to resort to spectacular, almost exploitative plotting. The fourth series ended on a cliffhanger with the hope of keeping interest alive for a fifth series.

As of the third series, because one of the actresses retired, a new actress and therefore, new policewoman took over the role. She succeeds her as the other policewoman’s new friend and gets together with the same man.
The show is well known for its drama and action. Aside from the twists thrown in with the relationships the characters have, the series employs high-speed car chases, explosives, hostage situations and thrilling gunfights to keep the audience’s interest. Some of its more memorable arcs include incidents where certain protagonists are framed and are forced to flee from the police as well as other gangs, headed by the Chinese Mafia.