After losing her memory in an explosion, Marine Sergeant Julia Langdale has recovered the life she lost and returned to active duty.

On leave with her husband, they must both learn to adjust to the murky waters of married civilian life whilst battling the parts of their pasts which refuse to stay buried.

With their relationship teetering on the edge and an inquisitive MI5 agent digging into their lives, Julia and Marc must both face their pasts as they race back to Afghanistan for an unsanctioned mission.

With only themselves for back-up and the risk of execution if they're caught, can they come through this together, or will this one mission tear them apart?