Falling in love comes easy for some, but loving someone unconditionally is easier said than done. At least it has been for Caleb and Faith. High school sweethearts who first fell in love before one of the most terrible days in US history altered everything they thought they knew. Still wanting to give her heart wholly to the boy who showed her what love could be like, Faith discovered the boy she fell for no longer existed. That one day forever changed him. Now determined to enter a world teeming with unknown danger, Caleb decided it was no place for Faith. Willing to do whatever it took to make the world a better place for those he loved, even though it cost him the future they could have had. Until the fateful moment when his reality is shifted and he finds his entire world by her side. In the blink of an eye, Caleb's worst fear becomes a reality as his life flashes before him and the world fades to black. The family he built is gone. Erased. Lost in a world he can't remember. The only thing that feels right is the woman who's there when he opens his eyes. He can't shake the feeling that somehow she's his. Is their love, even without all the memories, enough to anchor him to her once again? Will Faith have to let go of the man she once knew so she can have a future with the man he is now? When Caleb's calling to protect the world from unseen dangers threatens their happiness, will he know enough to keep them safe?