Anna, a 17-year-old, is excited to host her first big birthday party without her parents' supervision. However, some of her guests become heavily intoxicated and leave a mess and worse, they destroy her father's favorite record. When her parents return and find the destruction, Anna, feeling guilty and ashamed, runs away to Munich with her admirer Simon. They experience the city's nightlife and meet new people. Meanwhile, Anna's parents reach out to Simon's family and work together to locate the missing teens. As they search for their children, they reflect on their own wild and youthful past.