When a nun in a remote convent claims immaculate conception, the Vatican sends a team of priests to investigate, concerned about an ancient prophecy that a woman will give birth to twin boys: one the Messiah, the other the Antichrist.

December 31, 1320. Residents of the medieval city of Nischburg, who survived two plague epidemics, are preparing to celebrate the New Year and quickly forget about all the problems that have fallen on their heads. But it turns out that not everything that is possible has fallen on their heads. A huge stone flies to Earth, which will fall in about twelve hours. The wise Baron decides not to say anything to anyone, but to distract his subjects by having a luxurious feast for all the money left in the treasury. The holiday begins!

Nimble and his team, in order to save Sprat from prison and the restaurant from ruin, organize an off-site wedding party in London. There they become participants in many curious situations caused by the difference in mentalities of different countries.