Lieutenant Orso first appears alongside General Medrano when Medrano meets with Quantum member Dominic Greene in Port-au-Prince in Haiti. Greene's girlfriend Camille Montes is also present, and Greene orders Medrano to take her away, so Orso grabs her and escorts her into a boat. However, James Bond arrives on a motorcycle from which he jumps onto the boat and rescues Camille.
Orso is later seen by Medrano's side when he met with Greene and corrupt police colonel Carlos at the Perla de las Dunas hotel in the Atacama Desert. After Medrano has finished his dealings, he lures the hotel maid into one of the rooms to rape her while Orso and another soldier stand guard outside. Camille, who has sneaked into the hotel in order to kill the general, arrives and shoots the soldier dead. Lieutenant Orso tries to stop Camille, but she shoots him in the chest and knocks him over a railing to his death.