Schwimmen is the story of Elisa and Anthea, two very different girls, whose friendship gives them stability in the most difficult time of their young lives. But their innocent friendship soon turns into co-dependency. To maintain their cohesion, they develop a game – which turns them from victims into offenders. They start recording everything they do with their cell phone cameras. Soon they turn the camera around and secretly film their classmates, particularly the ones who used to bully Elisa. Their friendship takes on a destructive dynamic, which becomes highly dangerous for those who get in the duo’s way.