A wealthy household massacred in Spain. Unidentified mummified remains found at the foot of The Rock. A US Congressman's run for President hangs on events in Gibraltar. What's the connection? Detectives Tamara Sullivan and Gus Broderick face the most dangerous and elusive murder investigation of their lives, and for Broderick, it's about to become all too personal, with his career in real peril as his past comes back to haunt him. Will Sullivan and Broderick's partnership survive this latest case, as killers stalk the narrow streets of Gibraltar?