Sienna Blake is used to chaos. As a well-known movie star, she thought she'd seen it all. But that was before she fell in love with Craig Simmons, a navy SEAL and member of the Saint Squad. The path to matrimony has been strewn with postponements and disruptions, but wedding bells are finally going to ring—until Craig disappears just ahead of the most important day of their lives, leaving Sienna to evaluate whether she's really cut out for the uncertainty of life as a military wife.

After a potential terrorist threat overseas leaves his wedding plans in ruins—again—Craig realizes he needs to make this wedding happen or lose Sienna forever. In short, he needs backup. With the enthusiastic help of his Saint Squad teammates, wedding plans are once more set in motion. But as the big day draws near, a startling discovery may mean a life-or-death situation for the Squad. The overseas threat looms much closer to home than they ever thought possible. Now it's not just a quest to make it down the aisle—it's a battle to survive.