In a deteriorating gothic metropolis, warrior nun Dorothy is on a mission to eliminate supernatural beings. A part of the prestigious Crimson Sisters, she aims to cleanse the city of its vampire infestation. One night, fate intertwines her path with Maria, a wounded woman with unexpected fangs and heritage. Extending a lifeline, Dorothy proposes an unconventional solution: join me as my companion. United, they delve into the enigmas surrounding the vampire threat looming over their city.