In troubled times, in one of our special services, the technical genius Markov invents a device that affects the human psyche: anyone can be persuaded to do anything or be forced to forget everything!.. During the first foreign test, Markov disappears along with the device. It was in Marseille...And these days an evil oligarch finds out about the device and begins a search. His goal is clear: with this thing you can influence everyone, including ministers and even the President!.. Feeling threatened and persecuted, Markov’s ex-wife comes to the SOVA detective agency. The chief of “Sova” Savenkov begins to unwind the case. And out of harm’s way he sends Markov’s widow on a voyage around Europe...