A woman takes guardianship of her estranged sister, the only survivor of a recent mass cult suicide. Her happiness at their reunion soon turns to terror as her sister's influence turns her and her husband's life into a savage nightmare.
| Actor | Role |
|---|---|
 Skeet UlrichBen | Ben |
 Mena SuvariSarah | Sarah |
 Elizabeth MarvelKay | Kay |
 Nick StahlRay | Ray |
 Lin ShayeAunt Dottie | Aunt Dottie |
 Alicia SanzGrace | Grace |
 Mackenzie FirgensLoraine | Loraine |
 Grant FeelyYoung Ray | Young Ray |
 Ben BladonTall Thin Man | Tall Thin Man |
| KKelly Russell SchwartzJulie | Julie |
 Michalina ScorzelliConnie | Connie |
| LLee ShermanDr. Holt | Dr. Holt |
| KKyle ZinglerOfficer Elster | Officer Elster |
| LLucy Catharine HaskillIda | Ida |