By nightfall, two seemingly innocent orphan girls, Louise and Henriette, transform into vampires, roaming the streets of France in search of blood and solace. Blind by daylight, they possess the ability to see during the dark of night. Their condition is shrouded in mystery; they recall snippets of past lives spanning centuries—memories that come to life in their nocturnal wanderings. As they meander through cemeteries and deserted buildings, their quest is not just for sustenance but also for understanding their own existence. The girls share a deep, unbreakable bond, a connection that sustains them amidst their eternal search for belonging.

While others perceive them as vulnerable and helpless due to their blindness, the girls use this misconception to their advantage. Under the care of a kind doctor, they are given refuge in an orphanage, where their daytime façade allows them to blend in among the other orphans. By night, however, they slip away into the darkness, embracing their true nature. Their dual lives present a constant struggle between their desire for a semblance of normalcy and the instinctual need to feed. The complexity of their condition is further explored as they encounter various characters during their night-time escapades, each meeting serving as a piece to the puzzle of who they were before the curse of vampirism befell them.