: Alexis is a formerly deaf woman who regained her hearing during her family's brutal murder. Because her hearing is now failing again, she begins a killing spree to record specific "human instruments" to maintain her ability to hear.
A standout feature of the 2021 horror-slasher is its unique exploration of synesthesia , where the protagonist, Alexis, literally "sees" sounds as vivid, psychedelic explosions of color—but only when they are born from extreme pain and violence.
: Critics largely praise Jasmin Savoy Brown for grounding the absurd premise with a performance that makes a cold-blooded killer surprisingly sympathetic. Sound of Violence - The Blogging Banshee
This sensory concept drives both the plot and the film's distinct visual style:
: Instead of standard slasher tropes, the kills are often presented as elaborate musical experiments. One of the most memorable scenes involves a harpist whose performance becomes a gruesome sonic event .