When shy, well-meaning high schooler Zoe joins a Catholic school, her family is thrilled by the discipline and values they believe it will instill. But their excitement turns to suspicion when a new, charming nun named Sister Sophia arrives. Beautiful and charismatic, she quickly earns everyoneβs trustβexcept Zoeβs. Beneath her holy exterior, Sister Sophia hides a dark obsession, and her attention quickly shifts to Zoeβs older brother, Jason. What begins as concern becomes a chilling game of manipulation.
As Zoe digs deeper, she uncovers Sister Sophiaβs twisted past and realizes her family is in grave danger. But convincing anyone of the truth becomes nearly impossible as the cunning Sister turns others against her. Bad Sister is a tense, psychological thriller about trust, obsession, and the terrifying lengths someone will go to for love. With every moment, the line between protector and predator blursβuntil itβs almost too late
