An urgent plea for help brings Richard Mackenzie home from Afghanistan on special leave. But when his mission to protect his brother and brother's family goes horribly wrong, he finds himself on the run with his 6-year-old niece and more questions than answers. The one person who may be able to help him is a sister-in-law he's never met, and she poses a whole other kind of danger. Nina Tauredaux has come back to DC to make peace with her sister only to face a horrifying scene of carnage. And when Nina's soldier brother-in-law shows up with her niece and a tale of conspiracy and danger, she faces a choice: go with him or lose the last of her family forever. Now the three of them are trying to stay alive as they look for answers in the one place to which Richard swore he'd never return.