Allen's son is in danger. A rare form of epilepsy is damaging his brain and Allen's insurance is cutting him off. To cover the costs, Allen returns to being a high-tech mercenary. Not exactly ideal for a father who enjoys carbs far more than stomach crunches. After his first mission back, Allen soothes his wounds before getting a message from Eamon Tor, America's first trillionaire. Tor tells Allen about Eden Therapy. It treats terrible diseases but can also drive patients insane. Still, it's exciting news—especially with the offer of complete care for Allen's son as a reward. But Tor has a surprise. It's a choice that puts Allen's conscience, marriage, and abilities to the test, and sends his ragtag team on a dangerous operation halfway around the world.