In present day St. Petersburg, police major Igor Grom, an honest and skilled cop with unconventional methods, pursues a vigilante murderer in the mask of a plague doctor.

Humanity knows two types of logic: male and female. In the new TNT show, we do not push them together, but rather make them work for one common result. Star couples, partners on the set, just good friends and acquaintances will together try to build logical links between the most seemingly illogical events, objects or facts.