A century ago a portal opened over Central America and the Tetza that came through changed our world. Now the world bends all its effort to making the Iron Kings—great mechs that must battle the Tetza for humanity's continued survival in gladiatorial combat. Anita Marr is the greatest of the pilots and is chosen to pilot a new prototype that could change the tide in humanity's favor.

A story of heroes, impossible armors, ghosts and two people, centuries apart, connected by their need to protect the ones they loves.