Synopsis:

They thought the flight was the beginning. It was only the warning.

After unraveling a midair murder and discovering a cryptic Roman coin in Altitude of Shadows, former intelligence officer Luke Prescott and cryptologist Cass Vance are thrust into a deeper, darker game. The symbols they uncovered weren’t just relics of the past; they’re messages from a killer rewriting history through blood.

As bodies vanish across Europe and ancient ciphers lead to underground rites, Luke and Cass must race against time to stop a symbolic execution embedded in medieval ritual. But with each clue they crack, one truth becomes terrifyingly clear: the killer isn’t just echoing the past, he’s orchestrating the future. And he’s only just begun.