A routine raid led by Emer Berry, a detective in the Irish Criminal Assets Bureau, reveals that a small-time drug dealer has been receiving substantial funding from a seemingly untraceable source not in cash, but in rough diamonds. When these diamonds are linked to a series of bombings in Belgium, Emer is forced to work with Police Commissioner Christian De Jong. Eventually, reluctantly banding together, they unravel a political conspiracy fueling domestic unrest for financial gain; caught up in this web of greed are the Brannigans, a wealthy Irish dynasty with ties to Antwerp. Drawn into a battle of wits with the family, Emer, Christian, and the CAB team must follow the money to stop another terrorist attack before it's too late.