Charlotte Graham is at the center of the most famous kidnapping in Chicago history. The FBI and local cops found her two abductors, killed them, and rescued her, but it took four long years. The fact that she was found just three miles from her home, had been there the entire time, haunts them. She’s since changed her identity, found a profession she loves, and rebuilt her life. She’s never said a word — to the cops, to her doctors, to her family — about those four years.

Ann Silver is a cop’s cop. As the Midwest Homicide Investigator, she is called in to help local law enforcement on the worst of cases, looking for answers to murder. Hers is one of the region’s most trusted investigative positions. Paul Falcon is the FBI’s top murder cop in the Midwest. If the victim carried a federal badge or had a security clearance, odds are good Paul and his team see the case file or work the murder. Their lives intersect when Ann arrives to pass a case off her desk and onto his.

Commander Mark Bishop is deliberately low-key: "I'm in the Navy." But commanding the ballistic missile submarine USS Nevada, keeping her crew trained and alert during 90-day submerged patrols, and being prepared to launch weapons on valid presidential orders, carries a burden of command like few other jobs in the military. Mark wants someone to come home to after sea patrols. The woman he has in mind is young, with a lovely smile, and very smart. She's a civilian, yet she understands the U.S. Navy culture.

An FBI undercover operation gone bad convinces Rae Gabriella to move near her hometown and work as a private investigator with another former agent. But the small town of Justice, Illinois, is not as safe as she thinks. Attractive and stylish young women, just like Rae, are quietly dropping dead in their hotel rooms, with money and valuables still untouched. When the next victim turns up just a few rooms away from Rae's hotel room, the grieving parents hire her to investigate.

EMS helicopter pilot Penny Carlton is used to high stress situations, but being forced to land on a mountain in a raging storm with a critical patient - and a serial killer on the loose - tests her skills and her nerve to the limit. She survives with FBI Special Agent Holt Satterfield's help. But she's not out of the woods yet.

Luke has teamed up with Faith before, but he's not convinced she's up for the job, and she's not convinced he's telling her everything he knows. As more agents are targeted, Luke and Faith will have to learn to trust each other and work together to bring a killer to justice and prevent any more names from joining their fallen brothers and sisters on the Secret Service Wall of Honor.

Montana rancher, Knox Marshall's, danger years are behind him. A former bull-rider, he now runs the Marshall family ranch, raising champion bucking bulls for the National Professional Bullrider's Expo (NBR-X). But although he's successful and wealthy, at 30, he can't help but wonder if his best years are behind him. His life is stable, expected and…boring. Kelsey Jones just wants a safe life, a family, a home. Well, at least when she's off stage. Onstage, she's the beautiful rising star of the country trio, the Yankee Belles.

Radio-talk-show host Eve Reilly is used to backlash from her pot-stirring on-air commentary and interviews. But now it seems a disgruntled listener is resorting to more than angry words to express their displeasure. When a suspicious package arrives on her doorstep, Eve turns to law enforcement for help. Police Detective Brent Lange can't find any evidence to link the string of unsettling incidents that follows, but he's convinced they're connected. As the harassment grows more menacing, it becomes clear someone wants Eves voice silenced - permanently.

Detective James Holton has been honorably discharged from the Army Criminal Investigation Division due to wounds sustained when an IED blew up near him. Now with the Lake City Police Department, he's rooming with his good buddy and partner, Cole, while he figures out his family dynamics. Physician Assistant Lainie Jackson is eighteen months out from an attempted murder perpetrated by her ex, which ended when she managed to grab the weapon and shoot him. When he appears to have survived and is back to finish the job he started, Lainie insists it's not possible.

Elite Guardians bodyguard/former sniper Christina Sherman has protected uncooperative clients before—but this time, well, her client is bossy, headstrong, and occasionally eats off the floor. Yes, he’s a highly trained military working dog, but certainly her skills could be put to better use, right? Not according to former Special Forces Air Commando Grey Parker. He needs her help to protect his dog while he undergoes an experimental surgery that could restore his ability to walk.