当一段身穿深绿色连帽衫的神秘人物杀死两只小猫的视频被传到网上时，整个互联网都轰动了。一群业余网络侦探开始联手追踪发布者。在一场危险的猫鼠游戏中，每一次点击都会鼓励令人毛骨悚然的作恶者发布更多令人不安的视频，直到最后一…
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In April 2013, chaos erupted in Boston near the finish line of one of the world's oldest and most prestigious marathons. It was the worst terrorist attack on the United States since 9/11 and led to one of the most ex…