Horror novelist Aileen attempts to rebuild her world alongside her young son, Santi, and relocates to an ancient estate managed by five enigmatic sisters perpetually dressed in mourning attire. As she battles an inexplicable, consuming exhaustion, long-buried memories begin to resurface, transforming the house into a physical manifestation of her fractured psyche. She discovers that the sisters harbor a disturbing, ritualistically violent, multi-generational connection to her lineage, which she must confront to save her son from this ancestral curse.