In the charming rural town of Trail Stop, Idaho, accessible to the outside world by only a single road, young widow Cate Nightingale lives peacefully with her four-year-old twin boys, running a bed-and-breakfast. But one day, Cate is shocked when armed men storm the house, demanding the mystery man's belongings.

Sela Gordon, shy owner of a Tennessee general store, prefers solitude. If anyone can chip away at her protective shell, it’s the handsome, mysterious, ex-military man who’s been hiding for two years in the wilds of Cove Mountain. But when he warns her that a catastrophic solar storm with the capability of taking down the power grids is approaching, Sela must come out of her shell and be the leader Wears Valley needs.

Blair Mallory lives the good life. She's pretty, confident, and the owner of a thriving upscale fitness center. But in the shadow of success, a troubled member of the club develops a strange fixation on her, imitating her style and dress. Matters take a darker turn when the look-alike is shot dead - and Blair witnesses the horror.

For Morgan Yancy, an operative and team leader in a paramilitary group, nothing comes before his job. But when he’s ambushed and almost killed, his supervisor is determined to find out who’s after the members of his elite squad—and why. Due to worries that this unknown enemy will strike again, Morgan is sent to a remote location and told to lay low and stay vigilant. But between a tempting housemate he’s determined to protect and a deadly threat waiting in the shadows, keeping under the radar is proving to be his most dangerous mission yet.

No one can get close to John Medina, the CIA's legendary Black Ops specialist who works in the shadows of the government's deadliest missions. And no one knows the dangers better than Niema Burdock. A sharp, steely-nerved communications expert, Niema and her husband, Dallas, worked side by side with Medina on an explosive mission that went tragically wrong. Now Niema has withdrawn to a quiet Intelligence position, and a safe - if predictable - existence that has helped her heal her scars from five years ago. But now John Medina needs her....