A missing child causes four families to help each other for answers. What they could not imagine is that this mystery would be connected to innumerable other secrets of the small town.
The small german town of Winden is shook by the disappearance of a teenage boy. While the townsfolk are occupied with secrets of their own, at nightfall a group of teenagers try's to recover something the missing boy may have left behind.
On the day of the apocalypse, Clausen executes a search warrant at the power plant as Jonas and Claudia use the time machine to connect past and future.
Charlotte and Ulrich try to piece together what happened in the bunker. In different times and worlds, Jonas and Martha work to gain each other's trust.