Habit of the Dog

Screenplay draft

Sister Margot knelt in the rehearsal loft above St. Peter’s sacristy, habit stiff with starch, her voice cracking on the descant while the other sisters held perfect pitch. Cardinal Rossi’s decree arrived by messenger at dawn: her tone-deafness mocked the liturgy, and the small matter of correcting a visiting bishop’s Latin during High Mass sealed the excommunication. She was to leave Vatican City by vespers with nothing but her rosary and the clothes on her back.  

That night the moonlight pooled across the empty nave and Sister Immaculata stepped from it, still wearing the 1957 habit she had died in, keys and a fountain pen clipped to her cincture. She pressed two knives into Margot’s palms; the blades glowed like communion wafers left too long under a spotlight. “They only cut what sings back,” the ghost said. Margot tested the weight, spun once on the marble, and the habit flared exactly like a stage direction she had never been allowed to follow.  

By morning the first hellspawn clawed through the floor of the Apostolic Palace, wearing the faces of dismissed altar boys. Margot met them in the Hall of Maps. She sang one cracked bar of “Hail Holy Queen,” the knives answered with a sound like cymbals struck underwater, and two heads left their shoulders in the same instant. The bodies dissolved into sulfur that smelled of burnt hymnal pages. When they reformed three minutes later she had already reloaded the compact pistols Immaculata had taped inside her sleeves and was halfway through the second verse, feet moving in the precise box step the choir mistress once demanded for processions.  

The Swiss Guard tried to stop her at the Bronze Doors. Their halberds glanced off the knives’ light. Margot dropped into a low crouch that could have been the opening of a Rodgers number, rolled between two pikes, and rose firing. Spent casings rolled across the porphyry like dropped offering plates. By the time she reached the Scala Regia the body count stood at eleven. Every reload required the same bar of song; the melody itself seemed to keep the knives sharp.  

Midnight found her in the Sistine Chapel. Demons wearing the faces of Renaissance popes dropped from the scaffolding, their wings tearing the painted sky. Immaculata’s ghost flickered beside the altar, directing traffic with the old fountain pen. Margot spun through a gap in the press, habit whipping like a dancer’s skirt, and planted both knives in the lead creature’s eyes. The chapel’s acoustics turned her off-key note into a weapon; glass in the high windows cracked outward.  

At the midpoint the demons adapted. They began humming the same hymn in perfect pitch, stealing the knives’ glow for themselves. One blade shattered against a shield made of stolen plainsong. Margot retreated to the necropolis beneath the basilica, breathing through the dust of two thousand years of bones. Immaculata did not follow. The ghost had been the first to fall when the knives turned; her form unraveled into the same sulfur the demons left behind. Alone, Margot pressed her forehead to the cold wall of a pagan tomb and listened to the creatures above learning the rest of the song.  

She returned at first light with only one working knife and the pistols. The final confrontation took the loggia of St. Peter’s Basilica itself. Dawn light hit the colonnade while Margot climbed the balustrade, habit torn to the knee, voice steady for the first time in her life. She sang the hymn straight through without a single flat note. The knives, reforged from the broken pieces she had collected, flared white. Every respawned demon that tried to match her pitch found its throat opened by the very melody it had stolen.  

When the last one dissolved, Margot stood at the center of the empty square, arms raised in the final pose of a curtain call no one would ever applaud. The surviving pigeons wheeled above her in formation. From the knife hilts, still glowing, rose a thin thread of incense that smelled exactly like the rehearsal loft she had been banished from. She did not lower her arms. The square remained silent except for the faint, perfect echo of her own last note returning from the colonnade.