Doreen und Isabel are 17-year-old twins from rural Saxony in East Germany. The two are successful oarswomen practicing hard to be accepted at a renowned boarding school for athletes. In 1988, a year before the Berlin Wall came down, they have the chance to spend the summer at Lake Balaton in the Soviet satellite state of Hungary. Already on their way to the young pioneer camp, the twins meet a group of guys from the West German city of Hamburg. Doreen falls in love with Arne. For the first time the sisters don't share everything and need to take the most momentous decision of their lives.