Indiana Jones meets Bourne. Byzantium, 350BC - A philosopher hides an ancient and dangerous bronze box. Varna, 1998 - An artefact goes missing from the Varna Necropolis dig site and the suspect is killed in a car accident. The Present - Archaeologist, Sasha Blake, is recruited by a covert organisation, The Agency, to find the bronze box. Partnered with a man from her past, Tom Sheridan, they begin to uncover a conspiracy and an ancient brotherhood. Swept into a deadly game of cat and mouse - Can Sheridan and Blake find the box before a group or terrorists?