In the crime series "Inspector Lucas", the heroine of the same name investigates in the Danube city of Regensburg. She will initially be supported by Stefan Deuter, who will later be replaced by Leander Blohm.Since her husband had fallen into a coma and can only be treated in a special clinic in Regensburg, Bavaria, the Cologne chief inspector Ellen Lucas (Ulrike Kriener) moves to the Danube. Here she is appointed head of a special commission. She is assisted by detective inspector Stefan Deuter (Thure Riefenstein), who is replaced after some time by detective inspector Leander Blohm (Florian Stetter). Ellen Lucas' predecessor, Boris Noethen (Michael Roll), who was promoted to department head, also has an influence on the team.