Lena, a young criminal, finds herself lurking near a cash dispenser. Just as her unsuspecting victim finishes using the machine, she swiftly pickpockets his credit card. However, her luck turns when the police apprehend her mark. In a desperate bid to escape, Lena flees but is chased down by a police officer named Tom. Their encounter on a bridge leads to a brief conversation before he attempts to arrest her. Displaying unexpected defiance, Lena fights him off and makes a daring leap off the bridge, landing on a passing boat.
Later that evening, Lena visits a nightclub run by Louise. The club becomes a chaotic sanctuary as Louise and Lena dance amid the pulsating music. Louise offers Lena a drink, and when Lena retreats to the bathroom, Louise follows her, not for a friendly chat but to bite her. Terrified by this violent encounter, Lena rushes home. The next morning, she awakens to a burning sensation from the sun and an overwhelming craving for blood. In a state of confusion, she decides to confront Louise about what has transpired. Upon her return to the club, Lena meets Louise's two companions— the stoic Charlotte and the cheerful Nora. Charlotte suggests selling Lena to Russian pimps, believing it will help her accept her newfound reality (the term "vampire" remains unspoken in the film).
In a shocking turn of events, Lena launches an attack on one of the mobsters attempting to assault her but is shot by another pimp wielding a shotgun. A fierce fight ensues, and the women kill the pimps, not noticing one mobster hiding in fear. Before leaving, Nora steals one of the mobster's luxurious Lamborghini.
When Lena awakens at the hotel, Louise hands her a glass of what seems to be blood. As Lena drinks, she can feel her powers returning. Louise then bathes Lena, sharing her story of transformation. Initially filled with resentment toward her maker, Louise ultimately grew to cherish her after exploring the perks of her immortal existence. After her maker dies from sunlight, Louise contemplates suicide but opts instead to search for a new companion.
As Lena luxuriates in the bath, her short hair transforms, regaining its natural color. Her piercings fall out, and she heals from all past injuries. That night, the women embark on a wild journey, enjoying shopping, partying, and driving the stolen Lamborghini. As their escapades come to a close, they return to their hotel for their morning ritual—allowing the early sunlight to burn their skin while retreating inside before suffering any lasting damage. An unexpected kiss from Louise leaves Lena bewildered, leading to a playful yet hasty bite on Louise's lip, followed by an awkward apology.
The subsequent night, as Lena returns home to gather some belongings, she encounters Tom, who used a file on her to discover her address. They share a moment over coffee, but Lena's intuition prompts her to retreat in her Lamborghini when she spots Louise approaching. At the nightclub, she finds Charlotte in a private room. Charlotte opens up about her past life as a silent film actress, sharing memories of her husband and daughter. Louise, noticing a shift in Lena's behavior, takes the girls to Tropical Islands Resort, which features artificial sunlight, allowing them to experience a pool party "in the sun."
However, their revelry is interrupted when two night watchmen stumble upon them. Despite Lena's concerns for their safety, Louise reassures her that no harm will come to the men. Unfortunately, Nora ends the life of one watchman, while Charlotte cruelly kills the other, sending Lena into a panic.
As this chaos unfolds, Tom and his partner, Lummer, interrogate the lone surviving mobster, who claims that the "devil" murdered his friends and stole a Lamborghini. Connecting the dots, Tom realizes that the stolen car belongs to Lena. In the ensuing madness, the SEK storms the hotel, resulting in Nora's demise when she is caught in sunlight.
With only three women left, they retreat to the desolate Teufelsberg to plan their escape to Russia. Before they leave, Charlotte seeks a final glimpse of her elderly daughter, bidding her farewell with a haunting lullaby. With an entire day to kill before their departure, the girls return to their hideout for their morning ritual. However, when the sun rises, Charlotte sacrifices herself by locking Lena and Louise inside to let the sunlight consume her.
In a bittersweet farewell, Lena approaches Tom, forcing him to witness her true nature by healing from a gunshot wound. Moved to tears, they find solace in each other's embrace before slipping into sleep. Yet, unbeknownst to them, Lummer, suspecting Tom's involvement with the women, orders their incarceration. As chaos reigns, Louise quietly approaches the watchmen and ends their lives in the shower.
Louise, aware of the pain that comes with loving a mortal, kidnaps Tom, prompting Lena to follow. At Teufelsberg, she professes her love to Louise, who captures the moment as a beautiful lie just before turning deadly by shooting Tom. In a dramatic twist, Lena confronts Louise, hurling her into the brilliant sunlight where Louise meets her end with a serene smile.
Lena rushes to Tom, torn between her desire to bite him and the emotional turmoil that prevents her from doing so. Their world fades into chaos as the SEK arrives, and with Tom and Lena vanished, Lummer stands alone, whispering, "Good luck," before he departs from the haunting scene.
