Movie censor Enid takes satisfaction in her meticulous work, protecting innocent audiences from the unhealthy effects of watching the gore-filled decapitations and eye gougings she pores over. Her inner voice to secure is amplified by shame over her lack of ability to remember details of the long-ago loss of her sister, lately declared dead in absentia. When Enid is designated to assess a troubling film from the archive that echoes her hazy childhood memories, she starts to unravel exactly how this spooky work could be connected to her past.