The provincial town of Kalinov is at the turning point of two eras. New mayoral elections are coming, three people are entering the fight: the current head of the city Stepan Dikoy, his former right hand Vanya Kudryash and teacher Kuligin, who has been struggling for thirty years to prove the famous Cook’s hypothesis, for which promised a million dollars. Tikhon Kabanov jokingly suggests that Kuligin first find his father, who disappeared nineteen years ago during a robbery of a cash-in-transit vehicle. Find at least that missing million. Kuligin, who took up the investigation, and all the other Kalinovites, have no idea what this will lead to. A quiet town literally explodes: the arrest of the most influential woman in the city of Kabanikha, an attempted murder, provocative photos on Instagram... Everyone is tense and waiting for the outcome. And it will definitely happen... Together with the long-awaited thunderstorm...