On the anniversary of the death of his girlfriend, Ig Parrish grew horns. And this is not the only diabolical attribute acquired by him - now Ig unconsciously, by his mere presence, compels people to lay out the most cherished, most shameful secrets, to succumb to the most sinful temptations. Will Ig be able to find the real killer Merrin Williams (everyone in the city is sure that he killed her himself), while everyone around is dancing to the devilish music of horns, comprehend the gospel from Mick Jagger and Keith Richards and return to the Tree Cabin of Reason?