There is a secret code of the Knights Templar on the Camino de Santiago...

Sent by her father to locate the Knights Templar's greatest treasure—and save her kingdom from ruin—Princess Isabella of France finds one of seven secret doors that unlocks the Templars' mysterious treasure. With this discovery, she expects the mission to be easy. But when she is ambushed on the Camino de Santiago, Isabella is not only forced to seek refuge with the exact company she was sent to steal from, but she's unexpectedly reunited with her one true love, Etienne.

Shocked that the woman who'd betrayed him so long ago is now before him, Etienne is forced to put the past aside and do his duty as a Templar to help a pilgrim in need. It's not long before the past catches up to them. Now they must both decide: to love again, or to remain loyal? Etienne is tied to his vow as a Templar, and Isabella to the will of her father.

As Isabella and her unlikely companions journey across Spain, they unlock the Templars' secret codes, face immortal shadows, and discover the wisdom of the Camino de Santiago. Isabella's quest leads her to love, friendship, and self-discovery—but if she's not careful, it could also lead to the destruction of the world.