Julian, Yasin and Addi learn from the executor of their deceased mother's will that the three men, who had previously been complete strangers, are brothers. The news hits like a bomb. A German family man with a penchant for tricks, a spoiled, ambitious Turk and a rapping African – the three siblings immediately hate each other and it would all be nice if their paths were to separate again soon.

The last three weeks of school life have begun: After the Abitur, Germany's leaving certificate, the friends and schoolmates of Gymnasium Kerkheim (Kerkheim High) will not see each other again so soon. It is a hard time for Markus and his girl Sandra from a lower grade, as he wants to hang out with his old friends, whereas she wants him to be there for her. It's an even harder time for Dirk, who is to be expelled from school if he fails the math exam that is coming up around midday, and it is the hardest time for Michael, who is a perfect pupil, but has no fun in life at all - and doesn't even know it yet. When Steven calls out a party to celebrate his letter of exemption from the army, they all get together for one of the last real cool events ever.