A former prosecutor notorious for her aggressive tactics, Diane Harbaugh is now a DEA agent. But when she hears from Gustavo, a high-ranking cartel member with an invaluable secret about the international black market, her entire understanding of justice and duty is thrown into question. Gustavo sends her down a rabbit hole that leads to a criminal conspiracy more pervasive than anything she and the DEA ever suspected. She teams up with Ian Carver, a disillusioned CIA agent, and begins to unravel layers of deceptions, grifts and schemes that date back to the beginnings of the Afghanistan War. As they learn more, they become the target of cartel assassins, embittered spies and even their own government.