Deployed on a deniable SAS mission in war-torn Yemen, Matt "Mace" Mason is becoming embroiled in a hostage rescue that goes terribly wrong. He's up against the local warlord General Ruak Shahlai, but also American arms dealer Erica Atkins. In this series debut by former SAS agent Billy Billingham, Mace is forced to work with female CIA Agent (and Islamic scholar) Redford to prevent an attack that would spark a regional war and create the largest environmental disaster the world has ever seen.