Under mysterious circumstances, the restorer Lukas Albrecht drowns in the Canale dei Marani in Venice. While the easy-going Commissario Santo sees no criminal offense, the victim's widow resents the details. Anna, who is traveling from Vienna with her eleven-year-old son, doesn't believe it was an accident: her husband didn't have any alcohol in his blood, he knew the lagoon and could swim
At the beginning of 2000, the young commissioner Yvonne Weber moved from Frankfurt am Main to Eisenach. Together with the local colleague Frank Wolf, she is to review an unresolved murder case from the GDR era. The investigation team encounters inconsistencies in the file and it becomes clear that there is no interest in truth-clarifying the Eisenach department and the prosecutor's office in Gotha.
El día de su cumpleaños, Tobías va de compras a la ciudad con su madre. Mientras espera en el coche a que ella saque dinero de un cajero, desaparece sin dejar rastro. Su madre, angustiada, lo busca desesperadamente. Cuando regresa a casa, una llamada telefónica confirma sus temores: Tobías ha sido secuestrado. Entretanto comienzan a llegar los invitados a la fiesta.
