Mercenary Tom Locke operating as a “slum merc” in ISIS territory north of Mosul, Iraq, after being betrayed by Brad Winters, his boss at Apollo Outcomes, a high-end military security company. Since fighting ISIS pays nothing, Locke and the remnants of his team—Boonchu “Boon” Tripnet and ex-SAS commando Wildman—decide to accept a lucrative offer from Prince Abdulaziz, a member of the Saudi royal family, to locate a missing grown son who may be in Mosul. The elder Abdulaziz is plotting to make his family indispensable to the Saudi government in an effort to outmaneuver his rivals for the throne.