When 17-year-old Maddy Andrews discovers her seemingly perfect new stepsister has a sinister dark side, she must find a way to protect herself, and her mother–or risk becoming the latest in a long line of victims.
| Actor | Role |
|---|---|
 Christa RoseMadison Andrews | Madison Andrews |
 Eva IgoDevon Miller | Devon Miller |
 Cait CollinsLaura Miller | Laura Miller |
 Kiki YellamGia Benton | Gia Benton |
 Tyler NobleKent Miller | Kent Miller |
 Nicole WeberMaureen Delisle | Maureen Delisle |
| AAlexander ZapfIan Taylor | Ian Taylor |
| AAndrew AltepeterDetective Waldron | Detective Waldron |
| JJiccarra N. HollmanKathryn Woods | Kathryn Woods |
| DDan MuellerAdam Woods | Adam Woods |
| JJen JesperTeresa Motley | Teresa Motley |
 Andrew SteckerDetective Stevens | Detective Stevens |
| NNick HansenParamedic | Paramedic |
 Keely Yulla KempNurse | Nurse |
| SSarah MuckalaHospital Secretary | Hospital Secretary |
 Bronson PinchotPhotographer | Photographer |
| TTessa TorreanoBackground | Background |