The island of Sarjevane. It is there, in this secret haven of the Adriatic inherited from his father, that Largo Winch decided to blow. Until the moment when the arrival of a yacht draws him from his loneliness. On board: Obi Martins, founder of Aurora Dynamics and designer of drones with humanitarian aims. The reason for his arrival? Mysterious, because Martins is murdered before even docking! But what the killer did not know was that Obi had come with Hope, his young daughter. And the latter is now under the protection of Largo. He is stubborn, scared and courageous, she will remind the billionaire of a certain teenager: the one he was! Together, the unexpected duo will go to Nigeria and then India, to meet the aunts of Hope, who now lead Aurora Dynamics. But do they still respect the humanitarian philosophy of the late Obi Martins?