When Ellen attends her best friends' New Year's Eve 2019 party, she is hiding a secret: she has an affair with Sebastian, but he is married to Eva. Things are sizzling between Rolf and Dina. Mareike and Adam are at odds with each other. Maya wants children, Natalie can't make up her mind. The years pass and parties are celebrated as they fall. They love, argue, laugh and get married, children are born, some find each other, others break up.