The Ruler (2022)

Four strangers regain consciousness in a barren room with no memory of how they arrived or why they're together. A disembodied voice, calling itself The Ruler, begins issuing commands. They're forbidden from speaking, identified only by numbers, and any disobedience triggers escalating electric shocks—either to themselves or to one of the others. As the punishments intensify, the group is forced into a brutal game of survival, where loyalty is tested, paranoia festers, and the only way out may be to turn on each other.