In response to a wave of attacks and insurrections instigated by mutants that incite widespread fear across the United States, the government, in a bid to regain control and restore a sense of security among its citizens, initiates Project Sentinel, a clandestine initiative spearheaded by the brilliant scientist Bolivar Trask, aimed at developing advanced robots specifically designed for hunting down mutants, while, on the surface, these Sentinels are marketed to the public as noble "protectors of humanity," a façade that is soon shattered as the underlying reality of their true purpose is revealed.