Mystery writer Grace Miller has killer instincts when it comes to motive - and she'll need every bit of expertise to help solve her sister's murder.

A woman struggling with dementia is forced by her daughter to revisit her past - but sometimes memories are better left forgotten.

After years of slapdash sequels and waning fandom, the Camp Miasma slasher franchise is handed over to an enthusiastic young director for resurrection. But when she visits the original's star, a now-reclusive actress shrouded in mystery, the two women fall into a blood-soaked world of desire, fear, and delirium.