Keeping others safe is what Caleb Montgomery does. He's never had a problem taking on an assignment, whether it was during his dangerous SEAL days or his most recent job of training war mercenaries. But being assigned to keep Brynna Vincent and her adorable daughters, Maddie and Josie, safe from an unknown threat has thrown Caleb off his axis. ... Brynna is sick and tired of being afraid. All she wants is a normal, quiet life for her and her precious girls. Just as she's settling into her new home in Seattle and feeling safe again, Caleb shows up on her doorstep insisting the danger is as high as ever.