CIA covert operator Savannah James is after intel on a potential coup in the Democratic Republic of the Congo, but she needs a partner fluent in Lingala to infiltrate the organization. Sergeant First Class Cassius Callahan is the perfect choice, except he doesn’t like her very much. He doesn’t trust her, either, despite the sparks that flare between them, fierce and hot. Still, he accepts the assignment even though their cover requires Savvy to pose as his mistress.

They enter battle-worn Congo to expose the financing for the coup. A trail of cobalt, gold, and diamonds leads them into the heart of darkness, a jungle in which everyone is desperate to find the mother lode of ore and gems. Betrayal stalks them as they follow the money, but Savvy will stop at nothing to bring down the would-be dictator before he can ignite a firestorm that will engulf all of Africa.

Deep in the sultry rainforest, spy and Green Beret forge a relationship more precious than diamonds, but Cal knows Savvy is willing to sacrifice anything—or anyone—to complete her mission. As they near the flashpoint, Cal will have to save her from the greatest threat of all: herself.