The information you provided is not enough to form a complete novel because it lacks key plot elements. Underworld novels usually contained elements such as gang struggles, crime, escape, violence, and dangerous scenes. If you can provide more information about the plot, such as the identity of the female protagonist, the background of her subordinates, the background of the termination of the contract, and the relationship between the female protagonist and her subordinates, I will try my best to provide you with a more accurate answer.