Adamsberg, with the priceless Danglard, is located, a bit bored, in England for a meeting of the great police Europe: it is no less than "harmonizing migratory flows" with twenty-three countries colleagues. But where there is Adamsberg everything can happen. And the discovery of the seventeen shoes - or as the precise Danglard says, "seventeen feet, eight pairs and a single foot" - pushes our "sheet of clouds" to travel another Europe: the one where after almost three hundred years the lineage of Dracula has not stopped infesting the world. Between London, the surroundings of the Hauts-de-Seine and Serbia, through the "black tunnel" leading to the tomb of Peter Plogojowitz, exhumed in 1725 with the suspicion of being a vampire, the police investigation is intertwined with the exploration of That unknown continent that is human madness. Humor, visionary fantasy, erudition, twists, amazing dialogues, ability to investigate the deepest pleats of the soul blend in an intertwining in which Adamsberg is the accounts with the myth and the reality of the vampire. And with a past that seems back to ruin his life.