In college, Griffin McCray and his four best friends had their lives planned out. Griffin and Luke Gallagher would join the Baltimore PD. Declan Gray would head to the FBI and Parker Mitchell would go on to graduate school as a crime scene analyst. But then Luke vanished before graduation and their world—and friendships—crumbled. Now Griffin is a park ranger at Gettysburg, having left life as a SWAT-team sniper when a case went bad. The job is mostly quiet—until the day he captures two relic hunters uncovering skeletal remains near Little Round Top. Griffin just wants the case to go away, but charming forensic anthropologist Finley Scott determines that the body is modern—a young social justice lawyer missing since spring—and all evidence points to the work of an expert sniper. When FBI agent Declan Gray takes over the case, past and present collide. Griffin soon realizes he'll need to confront some of the darkest days of his life if he—and those he cares about—are going to escape a downward spiral of murder that crosses continents.

Work hits too close to home for crime scene photographer Avery Tate when her best friend disappears. The only lead is a chilling photo of her—apparently dead. As Avery, her boss Parker, and his friends dig into the case, she's forced to confront her feelings for Parker when they come face-to-face with a dangerous criminal.

FBI agent Declan Grey is in the chase of his life—but isn't sure exactly what he's chasing after. Threatened by a terrorist that "the wrath is coming," Grey fears something horrible is about to be unleashed on American soil. When his investigation leads him to a closed immigrant community, he turns to Tanner Shaw to help him. She's sought justice for refugees and the hurting around the world, and if there's anyone who can help him, it's Tanner. Tanner Shaw has joined the FBI as a crisis counselor . . . meaning she now has more opportunity to butt heads with Declan. But that tension also includes a spark she can't deny, and she's pretty sure Declan feels the same. But before anything can develop between them, they discover evidence of a terror cell—and soon are in a race against the clock to stop the coming "wrath" that could cost thousands their lives.

Private Investigator Kate Maxwell never stopped loving Luke Gallagher after he disappeared. Now he's back, and together they must unravel a twisting thread of secrets, lies, and betrayal while on the brink of a biological disaster that will shake America to its core. Will they and their love survive, or will Luke and Kate become the terrorist's next target?