Set in 2186 CE during the events of Mass Effect 3, Infiltrator follows Randall Ezno, a Cerberus operative whose faith in the organization shatters after he witnesses his advisor Inali Renata subjected to horrific experiments aboard the research station known as the Barn. Fighting through Cerberus defenses and escaped test subjects, Randall makes contact with a volus Alliance informant who promises that both he and Inali can be saved if he reaches the communications tower and signals for extraction. He reaches the desert pickup point only to find Inali—now grotesquely augmented—gunning for him. Behind her actions is the Director of the Barn, whose control over Inali Randall must break before he can escape.