This is actually the 5th installment of the Templar story. There are three novels before this and a Novella Before I go any further with this review, I would recommend that they all be read, in the correct order, so that you get the most from this ongoing story.
The Knights Templar fought in the holy land, with their leader Hughes De Payens. 9 Templars followed Hughes, and dug beneath the Temple Mount, unearthing something that the Almighty forces felt man did not need to see. These knights were cursed to fight Azazel and darkness eternally, until they succumbed to that very darkness, and became evil. BUT, they may see salvation, yet.
The prophecy is that the 6 Templars who were the original ones to go to the Temple Mount with Hughes De Payens would receive their Seraphs first. ( A Seraph is a reincarnation of the Nephilim, angels who chose to become human). They will be the salvation of the rest of the Templars. Caradoc was one of those remaining 6.
Isabelle and Caradoc met three/four years ago, when Caradoc went back to Europe to say a final goodbye to his beloved home Asterleigh ( or what was left of it). They had a whirlwind affair, and Isabelle was in love with Caradoc. But Caradoc knew that it would not be fair to Isabelle to lead her on, especially if his Seraph was out there, somewhere. So he left her, without a proper goodbye.
The Tears of Christ, hidden in an exquisite diamond gemstone necklace, are up for auction. Mikhail has decreed that Caradoc, and Tane go to Europe, along with Gareth, and bid on the necklace, along with other minor relics. But they must get the necklace, at all costs. Imagine Caradoc's surprise to find that he is bidding against Isabelle. The Templars must get this relic, because if Azazel gets it, he can activate the spear from the crucifiction with the tears. Without really spoiling anything, yes, she is Caradoc's Seraph. But can they get over the fact that Isabelle has a secret, that she has kept from Caradoc for 3 long years? And it is a big secret. And can the Tears be kept from Azazel? Each time a Seraph has been found, a relic has been involved. And they ended up losing the Relic that they fought so hard to save.
The book was well-written, and the plot was really good. Tane has been given a chance to redeem himself, and the other Seraphs are finally getting to see a little action with their men. There is mention of Sophie, Anne's sister in the book, and the fact that she is finally ready to be presented as a Seraph.
If you are looking for a historical accounting of the Knights Templar, don't look here. This is a fictional account of what happened to them. Again, I would highly recommend that these books be read in order. The series order is: Immortal Hope, Immortal Surrender, Immortal Protector ( a novella), and Immortal Trust.