Sisters Without Mercy is about a team of Special Forces of 101st Airborne women who go to the aid of one of their own. The main character is Dora Simmons. Her brother is killed under the most peculiar circumstances. Dora finds out during her search for answers that her brother Mark belonged to an elite group of FBI agents that were being systematically killed off by the director of the FBI. Dora realizes that she needs help. She calls on her teammates in the 101st eleven other women with outstanding abilities. Once Dora and her team decide where they have to go and what they have to do in order to find Mark's killer, the girls begin the execution of their plan. The investigation leads to some of the richest men in the world, including a Sheikh. The sisters also learn that their CO at Ft. Campbell may be involved with these very shady people. The sisters find out that this group of rich men are involved in drugs, pornography, slave trade.