Years after an alien invasion almost extinguished human mankind, refugee on a secret base on the Moon, three heroes decide to jump into a time travel in the desperate attempt to save the survivors but they don't know that the Sentinel is waiting for them.
In the age of social media, teenagers tell the story that they want people to see, with each video more daring than the next. But in this small town, a series of staged "murder" videos are turning very real.
