When Mark Sully unites rival leaders of the Galactic Concave with the ancient Galactic Council, he dares to dream of something greater: a Galactic Academy where the children of countless worlds might learn together. But what begins as a vision of unity could just as easily ignite chaos—because children can be cruel, and when alien species are involved, cruelty can turn catastrophic.

Even as Mark lays the foundation for this fragile future, Kairos—the birthplace of Earth Defense—comes under sudden attack. The trail of betrayal leads back to Earth itself, and to the new President of the United States. Torn between his duties to the galaxy and his responsibilities at home, Mark faces a choice that could fracture both.

Then, new assaults ripple across distant worlds. A distress call from the galactic core hints at the source of these shadowy enemies—but venturing into the radiation-shrouded zone could mean certain death. Refusing the call, however, could doom the civilizations Mark has sworn to protect.

Mia, his closest ally, warns him: he cannot answer every crisis alone. A crew must be chosen, lives must be risked, and trust must be placed in others. But as the galaxy rallies to confront the rising threat, a discovery emerges—one that could either arm them with unimaginable power or unleash a danger beyond comprehension.

Alliances will fracture. Enemies will multiply. And every choice Mark makes will echo across the stars.