An island lost among swamps, rivers and lakes, somewhere in northwestern Russia is where one morning, fishermen discovered the body of a girl in 16th-century clothing. To solve the crime, two detectives from different departments team up.

The film’s hero, Ilyich, cannot understand what’s wrong with him. Ilyich is a for- mer “mole”, an external observation agent in the KGB, then FSB. A skilled instructor. Now he is retired. From loneliness, he continues to watch those who catch his attention and curiosity. The doctor diagnoses him with empty sella syndrome (the syndrome of an empty Turkish Seat), which poses no danger for society... One day new neighbours move in, a young couple of musicians, and Ilyich’s life changes...