After recognising the scent of a bomber on his flight, a man with an inexhaustible sense of smell is called in to solve the murder of the head of a large construction company.

The deaths of two important men seem to be related, but the only clue is the cheap tobacco the Sniffer smells at both murder scenes.

When the Sniffer's son Alex is accused of murder, the by-the-books officer in charge won't let the Sniffer or Viktor near him.

The Sniffer creates an international stink when he smells a forgery in a masterpiece recently returned to Russia. The Sniffer's reputation is in danger.

The Sniffer and Viktor believe the deaths of four soldiers at a military hospital may be linked to abuse of power, but clues soon lead to something else.

When the son of a wealthy businessman is kidnapped, the only clues the Sniffer has to work with are a Frisbee and an energy drink can. Yulia and Alex argue.