The novel skillfully weaves together the story of the Holten family, gradually revealing dark secrets that have been simmering beneath the surface for years. Katharina must confront her own past to understand the present and save her niece.

The past plays a central role in 'Nachtfahrt'. Katharina's trauma and the unresolved events surrounding Ronja's earlier disappearance shape not only her actions but also those of other characters and drive the story forward.

Ronja's kidnapping puts Katharina under enormous time pressure. Every moment counts, and the deeper she delves into the case, the more dangerous it becomes. She must act quickly yet prudently to save her niece's life.