Two years have passed since Henry, Katharina, Tristan and Magdalena became a family. Just when they think that everything has returned to normal, chaos breaks out. Henry begins a career as a film producer; for his first project, he must work with eccentric young actor Matthias Schweighöfer. Meanwhile, Katharina is struggling with her role as a housewife and mother to baby Louis. In an attempt to save her marriage and rediscover herself, she moves into her own apartment. When Charlotte accepts a job abroad, Tristan faces a midlife crisis in the form of a young new girlfriend, Anna. He moves in with Henry, and the pair quickly become overwhelmed at the prospect of full responsibility for Louis and Magdalena. They decide to hire an attractive live-in nanny to help them out, which threatens Henry's possibility at a second chance with Katharina. During all of this, Magdalena develops romantic interest in a boy for the first time.