Looking for some peace in her life, FBI Special Agent Cassidy McKenna leaves the Bureau, retreats to a sailboat on the Chesapeake Bay, and struggles with the recent death of her husband and her shaken faith in God. When her former partner, Jake, is assaulted and nearly killed and then her marina is torched, Cass knows she must find out why. She believes the crimes are connected and unofficially investigates, not knowing that she is both the hunter and the hunted. She must connect the evidence, help Jake deal with his brain injury, and find the perpetrator before she becomes the next victim.