2030: in a gray and hyper-controlled Milan, Diana and Luca are sent on a mission to Lugano to spy on the exchange of a powerful weapon. Not far away, Edo Zani, Manticore Italy's heir, has to respond to an unexpected proposal from the head of Manticore France, Cecile. In the flashbacks, Diana investigates her parents' suspicious deaths when she meets Gabriele, a mysterious Citadel agent.

Diana is captured and struggles desperately to survive while Ettore has to make a hard decision in order to restore Manticore Italy's power, as memories resurface of the day when his relationship with Edo was shattered forever.

As Diana ponders her choice, Edo works on a powerful new weapon. Ettore tries to get closer to his son, playing one last, surprise card. In a flashback, the Zanis mourn Enrico while Diana realizes she's the last living Citadel agent.