Two archaeologists, Andy Scott and Kian Hunter, visit their colleague Bridgette Sanderson at Edinburgh University and become embroiled in a murder mystery with global implications. Charged with Bridgette's murder, they must prove their innocence and solve riddles to uncover the Knights Templar's treasure. Kian's premonition abilities become crucial as she is manipulated and chased while solving the clues. In their quest, the pressure separates Andy and Kian, leading Andy to fall for Rowen, a historian and thief also seeking the Templar's treasure. Throughout the story, Andy, Kian, and Rowen learn that Jonathan Giles is the key to the treasure and the murderer. His medieval adventures are documented by various Guardians, bringing them closer to the findings of the reliquaries and the buried treasure. Hunted, Kian, Andy, and Rowen face an ancient mysterious sect. As they uncover the treasure, they realize their only hope lies in Rowen's secrets, which bring life-altering changes to Kian and Andy.