"She thought she knew her sister—until the murder proved otherwise."
In the slick corridors of New York's elite publishing world, The Better Sister slices into a domestic thriller wrapped in ambition, guilt, and the suffocating ties of sisterhood. Based on the bestselling novel by Alafair Burke, the film is a slow-burn descent into betrayal, where every smile masks a motive.
Chloe Taylor (Charlize Theron) is the polished, powerful face of feminist journalism—successful, admired, and seemingly in control. Her husband, Adam, a former prosecutor, and her teenage stepson Ethan complete the picture of curated perfection. But everything cracks when Adam is found murdered… and Chloe’s estranged sister Nicky (Mackenzie Davis), Adam’s ex-wife and Ethan’s biological mother, returns from the shadows.
As the investigation unfolds, truths shift like sand: about the night of the murder, about the man they both loved, and about the fragile boy caught between two women who claim to protect him. But who’s the real mother? Who’s the better sister? And what did they both do to survive?
Dark, intimate, and relentlessly tense, The Better Sister explores how deep love can dig—before it turns into a grave.