It's the night of the most decadent party of the century. A rags-to-riches real estate magnate has planned an over-the-top weekend safari for the who's-who of celebrities at his sprawling residence in Villa Ada - once a public park, now the largest private home in Rome. Starlets, politicians, soccer stars, and intellectuals all turn up to rub elbows. Among them is a neurotically charming author struggling to write his next literary tome and pining for renewed recognition. He crosses paths with The Wilde Beasts of Abaddon, a satanic sect planning to ruin the evening's festivities in order to go down in history as a world-famous cult. What was intended as the most spectacular fête of the year quickly descends into apocalyptic chaos.