Omega has been seized by one of Cerberus' most accomplished and brilliant agents, General Oleg Petrovsky and Aria T'Loak is plotting her revenge. To reclaim her domain, she seeks aid of Commander Shepard and during her mission reunites with her ex, female turian, Nyreen Kandros. Reclaiming Omega from Petrovsky proves to be more difficult than planned, and the squad of three lights up a force field trap. The reactor's controls to power up the force field is located outside the trap. With combined biotics, Aria and Nyreen were able to create a small gap in the force field, long enough to let Shepard out. As Shepard proceeds alone to find reactor controls and shut down the trap, Aria and Nyreen must survive the incoming forces of Cerberus until they are free again.