In Stalin's Soviet Union, Tikhon Grigoriev lives a precarious life. He knows too much. He's seen too much. A single misstep could destroy him, and if he stumbles, he will take his family down with him. With Leningrad besieged by Nazi armies, the danger has only increased. He's not a man who wants to come to the notice of those in high places. But when he solved a murder that seemed supernatural, impossible, he attracted the attention of Leningrad's First Party Secretary. So when a plot of land grows vegetables of unusual size and vigor, and anyone who eats them goes mad, who should be called upon to solve the mystery but Tikhon Grigoriev. However, these secrets could get him far worse than a bullet in the head. For during the White Nights the boundaries between worlds grow thin, and in some of those worlds humanity can have no place.