The Gun Nuns are guardians of one of the gateways to Heaven. Although they expected the arrival of Johnny Blaze and Danny Ketch to quell the uprising of Zadkiel, the traitorous angel who took over Heaven, they first had to defend themselves against the Orb, Blackout and Vengeance. The Orb posed no problem, holy water bullets sent Blackout running and the Ghost Riders took care of Vengeance, but that didn't mean their troubles were over. After the gateway sent Blaze and Ketch to their destination, the Gun Nuns found themselves in the battle of their lives when the Deacon showed his face. It only took him two minutes to slaughter most of the nuns, and Deacon would have surely finished them all off if not for the arrival of Sara, Blaze's Caretaker. Sara had a score to settle with Deacon because he killed most, if not all, of The Sacred Heart Convent for the Sisters of the Holy Sepulcher, the convent which Sara used to belong to. Sara defeated Deacon, paralyzing him, and Mother Superior made a slave out of Vengeance to guard the gateway to Heaven in place of the fallen nuns.