Sulan, Episode 0.5: The Cube
Sulan, a sixteen-year-old math prodigy, leads a protected life. She attends the corporate-sponsored Virtual High School, an academy in Vex (Virtual Experience) for gifted children. When she witnesses the public execution of a teenage student, she realizes math won't protect her if she's on the wrong end of a gun. Defying her parents, she sets out to learn to protect herself.