Milan, 2030; where only eight years earlier the independent global spy agency Citadel was wiped out by Mantire, the powerful enemy syndicate that manipulates the world from the shadows. Since then, Diana Cavalieri (who is an underver Citadel agent) is alone, trapped behind enemy lines as a mole in Mantire. When Diana finally sees a way out and the chance to disappear forever, her only option is to trust the most unexpected ally, Edo Zani, heir of Mantire Italy, son to the head of the evil syndicate's Italian unit; who just so happens to be vying for Mantire's leadership against other European families.