In the course of the summer three brothers-in-law at a crucial age become involved in ephemeral romantic adventures in the area of Lake Volvi while their families vacation on the island of Thassos and… can wait.

An extremely ambitious neurosurgeon, devoted to his science and his child, is urgently called to operate on someone with a brain tumor. After the successful operation, the patient is kidnapped by unknown individuals with the assistance of the clinic's director. Geralis takes the matter personally and begins to investigate the case, discovering, first of all, that the patient is the president of the Hellenic Petroleum Organization, Panagiotis Argyropoulos, who has fallen victim to the relentless competition of multinationals, unwittingly becoming their tool.