A police chief's vacation is disrupted when an earthquake reveals a body on a Greek island. While handling this case, he must also investigate the murder of an Albanian couple.
A journalist's murder prompts Kostas to investigate her silencing while dealing with his father's death - a former cop who served during Greece's military junta.
Commissioner Kostas, with a sore shoulder, refuses every visit. The murder of Koustas, a well-known entrepreneur and owner of a nightclub, brings him to the attention of agent Nikos, who immediately competes with Petros.
Having suffered a heart attack, Commissioner Kostas is forced to be hospitalized. Klio, a young and brilliant secretary, identifies the body that emerged from the earthquake, revealing a connection with the Koustas case.
Despite doctors' unfavorable opinion, Kostas returns to work. Caterina is seeing Fanis, the doctor to whom Kostas owes his life. The case of Koustas' murder turns out to be more complicated than expected.
Kostas and his superior Ghikas secretly agree to try to understand the reason for the strange suicide on live TV of Favieros, a well-known businessman with a past as a political opponent during the years of the dictatorship.
After Favieros, also the politician Stefanakos kills himself in front of the cameras. For Kostas the "common thread" between the two is their past as political opponents. Only Zisis, a former political prisoner, could help him.
Kostas faces an investigation related to the years of dictatorship with the weight of his father's past; Caterina prepares for her thesis and Adriana tries to redefine herself also with a new job.
