美高中发生枪击案

聚焦一桩曾牵动许多人心的失踪和凶杀案，主角是在美国遇害的中国留学生章莹颖。该片由与她同校的学生施佳妍执导，展现在章莹颖失踪后寻找她和凶手(此后认定为布伦特·克里斯滕森)的过程，包括其男友和家人的努力，也展现她生前是怎样一个人。。Someone downloads an app on your phone behind your back. It looks like an augmented reality game, but soon you realize it's an app that connects to the world of the dead, which allows you to see the dead through the camera of the phone. On the screen you see a countdown timer starting from 24 hours and before it reaches zero, you have to download the app to someone else's phone...。