Thomas is a reclusive and disillusioned post-graduate concept artist residing in London, leading a life filled with monotony and darkness. Struggling with his overbearing mother and her domineering boyfriend, John, who recently moved in, Thomas finds his once bearable home life increasingly unbearable. Their frequent shouting matches propel him to seek refuge in a grim, damp apartment located in a decaying neighborhood—an environment that reflects his own internal turmoil.
One evening, while wandering through a dimly lit jazz bar, Thomas encounters Rhea, a strikingly beautiful yet elusive woman. Their instant connection draws him in, and he invites her back to his flat, where they eventually fall asleep together on the couch. However, his peaceful slumber is interrupted by a strange, tingling pain; he awakes to find Rhea silently feeding on his wrist. Her eyes shimmer with an uncanny glow, and blood smears her lips as she licks the wound closed, reassuring him that it will heal. While apprehensive, Thomas strangely feels exhilarated and does not resist.
In the days that follow, Rhea reappears, and Thomas begins to welcome her dark visits. She explains that she can only take small amounts of his blood to avoid causing him irreparable harm. Yet, the nature of their interactions escalates as the feeding sessions grow longer and more intense. Thomas finds himself increasingly captivated, to the point where he craves the pleasure of being drained, neglecting his art, friends, and even basic self-care. His once vibrant demeanor fades, leaving him pale and thin, while Rhea flourishes with an almost supernatural vitality.
Rhea shares her haunting tales of immortality, revealing that she was turned during the Victorian era. She narrates her experiences of witnessing the world change while remaining stagnant, detailing the torment of relying on others for sustenance. In a particularly chilling account, she recounts a brutal encounter with an abusive nobleman, describing how she drained him slowly, savoring each moment as “therapeutic.”
Tensions escalate when John follows Thomas to his new flat, bursting in one night to confront him and Rhea. In a fit of rage and disgust, he attacks Thomas and demands Rhea to leave. However, Rhea retaliates with supernatural strength, restraining John and brutally attacking him, causing blood to spill onto Thomas’s sketches. After slitting John's wrists to stage a suicide, she comforts Thomas, suggesting that John's demise was inevitable, thus freeing him.
As Thomas’s mother discovers John's lifeless body, she plots to have Thomas committed, believing he has lost his mind. Rhea intervenes once more but with a far more theatrical approach. One evening, she stealthily breaks into the kitchen while Thomas's mother prepares dinner, slashing her Achilles tendons with fatal precision before finishing the job by biting into her carotid artery. Rhea whispers haunting words to the stricken woman, “You always tried to mold him into something hollow,” leaving a gruesome scene behind.
Thomas is later found catatonic beside his mother’s corpse and is subsequently institutionalized. Within the confines of the psychiatric hospital, he begins to hallucinate Rhea, with her shadow lurking in his padded cell, perpetually smiling at him. Upon being released, he becomes fixated on understanding the nature of Rhea, creating intricate drawings and diagrams related to vampire anatomy, feeding behaviors, and surreal murals depicting blood-soaked love.
An investigating officer, Sergeant Kade, soon warns him to refrain from probing deeper into this dark world. In a shocking twist, Kade reveals himself as a vampire, cautioning that there are others who may not tolerate Rhea’s reckless behavior. He ominously intones, “You’re still food to most of us. Don’t forget your place."
Disregarding the warning, Thomas persists in searching for Rhea, tracking her down to an abandoned flat where he discovers her feeding on his former friend Dano, whose life hangs by a thread. The scene before him is a horrifying bloodbath, walls smeared with desperate handprints, while Rhea savors her meal. In a moment of dark desperation, she slices open her chest, exposing her still-beating heart to Thomas.
In an act of irreversible devotion, Thomas kneels and uses a shard of broken mirror to carve out her heart, consuming it raw. As he gives in to this visceral act, his screams echo through the desolate building as he begins a harrowing transformation: his veins darken, his senses heighten, and he undergoes a profound change.
By the time the authorities arrive, the flat is empty, leaving behind only traces of blood. The final shot captures a transformed Thomas: now polished, confident, and sharply dressed. He gazes out from a café, watching a young couple with a knowing smile, hinting at the profound shift within him as he embraces both the beauty and horror of his newfound existence.
