A life debt... Derek Tower has spent his life at war, first as a Green Beret and then as the owner of a private military company, Cobra International Security. When a high-ranking US senator asks Cobra to protect his daughter, a midwife volunteering in Afghanistan, Derek's gut tells him to turn the senator down. The last thing he wants to do is babysit an aid worker. But Jenna isn't just another assignment. She's also the younger sister...