Ten years ago, six-year-old Sera Valtoria’s life went up in flames—her family slaughtered by a brutal mafia cult known as the Blades of Acheron. Left to die in a burning house, she was rescued by a mysterious priest named Father Thorne—a man whose faith was forged in war and vengeance. Now sixteen, the world sees her as Sister Azraela: a quiet, devout nun devoted to peace. But beneath the habit lies something far deadlier. Trained in the art of silent assassinations, firearms, and holy retribution, she’s become a whispered legend in the criminal underworld—the Gun Nun. But vengeance isn’t her only calling. When she meets Mirna, a rogue angel with eyes like storms and secrets etched in light, Azraela’s black-and-white world begins to blur. Together, they uncover ancient truths buried beneath blood and prophecy—truths that could unravel heaven, hell, and everything in between. Now, as the Blades close in and a war brews in both mortal and divine realms, Azraela must choose: remain a weapon of wrath... or rise as something more. “GUN NUN”—a deadly tale of faith, fury, and the fragile line between vengeance and destiny.