There are mysterious murders in the area of ​​Lake Balaton. These places are shrouded in secrecy and constantly attract hunters: during the Second World War, the Germans had hidden a huge treasure here. Investigation of the murders entrusted to Major Kardos. He takes up the case, but in search of treasure he had many competitors. Kardos uses help from his loyal friend - a policeman-superman Etvash aka "Droplet".

The continuation of the series about the adventures of Major Kardos and former police Lieutenant Droplet who are busy now with an investigation of an European drug cartel which operates across Greece, Hungary and Germany.