Late at night, the siblings huddle together, the dim light of the old phone casting a glow on their faces. She sends him a video, her voice barely a whisper, "See what you're missing." He watches, entranced, as she slowly runs her hands over her body, her breath hitching as she touches herself. The phone clicks off, leaving him aching and alone in the dark. The next day, they act normal, but the tension is palpable. They're playing with fire, and they both know it.