In the late 1970s, a young Anna Bludso, Elle Lorraine tries to relax her hair with the help of her older cousin Linda Corinne Massiah. The chemical cream backfires, leaving a permanent scar on the back of her head and a memory that will shadow her for years to come.
Many years later, in 1989, an adult Anna is an assistant at Culture, a television station centered on African‑American music artists. The station is led by a formidable owner, Grant Madison James Van Der Beek, who makes a sweeping change by ousting Edna Judith Scott from her role as head of programming and replacing her with the glamorous Zora Vanessa Williams, a former supermodel whose presence signals a sharp shift in the station’s image. Anna, driven and ambitious, pitches a bold idea: to diversify the Culture VJs’ style and bring a live music video countdown show to the forefront. Impressed by her plan, Zora takes Anna on as her assistant, but with a demanding condition: Anna must swap her natural Afro-textured hair for a weave to fit the station’s new, cut‑throat image. To set the plan in motion, Zora hands her the address of Virgie’s, a high‑end hair salon that promises transformation.
Back at her aunt and uncle’s home, Anna receives support from her family—her uncle lends a book on African American slave lore, while her aunt provides enough money for the hair appointment. She travels to the salon, hoping for a fresh start, but when the receptionist informs her that the earliest slot is months away, Anna pleads directly with Virgie, the hairdresser herself, and persuades her to accommodate at the end of the day. Waiting, Anna experiences a nightmare that unsettles the nerves beneath the surface. The process is painful, and she faints as the weave takes hold. Virgie hands her a pink bottle of hair product and warns her never to let the weave get wet. In a brief moment of relief, Anna encounters her idol Sandra, whose weave once tangled in studio mishap, and she expresses a heartfelt fan‑to‑idol admiration.
Anna’s new hair brings her success, catching the eye of an old flame, Julius, Jay Pharoah. She tells him of her dream to host the countdown, and the VJs reluctantly agree to adopt the new look. Yet soon strange phenomena begin to surface: the hair seems to move on its own, Anna experiences intense hunger, and she dreams of hair being severed on a plantation. When her drunk landlord, Mr. Tannen, attempts to assault her, the hair unleashes its power, stabbing him and draining his blood in the process. Horrified, Anna witnesses the danger of the transformation and the growing sense that something monstrous is awakening.
At a party, Zora probes Anna about whether she’s still using the hair product, hinting that Zora may be afflicted as well. Edna reappears, disappointed by Anna’s abandonment of Culture’s original identity and critical of the weave as a sign of compromised integrity. The revelation lands hard when Anna learns that Zora has claimed the host position for herself and has begun an affair with Julius. When Anna and Julius later have sex, the hair possessively takes control again, and the ensuing struggle results in Julius’s death as the hair feeds on his blood.
Terrified, Anna flees to a natural hair salon to have the weave removed. She encounters Edna again, seeking guidance and redemption, but the stylist’s attempt to cut the weave out proves deadly: the hair kills everyone in the salon. In a flash of ancestral memory, Anna remembers a tale from the Moss Haired Girl, a slave lore story from her uncle’s book: a woman once wore a wig made from tree moss to imitate the straight hair of her enslavers, only to discover the moss is the hair of dead witches who possess the wearer. The frightening realization deepens as Anna discovers Zora and others who received Virgie’s weaves are now possessed.
The hair, fully in command, pursues Anna through the building. Trapped in a sound booth, she spots a gun‑lighter beneath the desk and prepares for what could be her final act. A spark from the lighter lights a cigarette, and a sprinkler system nearby—triggered by the lighter—douses the room with water. The wetness weakens the possessed hair just enough for Anna to sever the weave.
Returning to her aunt and uncle’s home, Anna learns that the hair product is made with pig’s blood, a disturbing ingredient meant to nourish and feed the hair. New advertisements for Culture feature Zora, who survived and remains fully possessed by the witches’ hair. Anna finishes reading the Moss Haired Girl and discovers that the plantation masters’ descendants continue to harvest and farm the hair. A truck bearing the same tree moss logo drives toward a plantation, loading boxes of hair and unloading the corpses of its victims. The plantation owner is revealed to be Grant Madison, the very man who once reshaped Culture’s image, and the tree moss grows nearby as a chilling symbol of control and consumption.
Amid the mounting dread, Anna’s cousin Linda Corinne Massiah announces she has secured an appointment at Virgie’s to get a weave put in, setting the stage for a renewed threat as the cycle seems poised to begin again.
