Drivinghomelateatnightduringaheavyrainstorm,Glenexperiencescartrouble.Nearwherehiscargetsstuck,hespotsahouse,knocksonthedoorandisgreetedbyanoddlyfriendlymiddle-agedman,Arthur,andhisyoungerwife,Cyndi.Thestrangecouplepourshimadrink,andthenmoredrinks,followedbyanunexpectedofferthatGlencan’trefuse.Elsewhere,ayoungwoman,Katie,isfeelingemotionallyweigheddownbyasecretromanticarrangementthatfeelslikeatextbookcaseofgaslighting.Andatthesametime,inanondescriptresearchfacility,medicalprofessionalJuliebeginsquestioningherroleinabizarreexperiment,fearingthatshe’sdoingmoreharmthangood.