Mr and Mrs Barbezat,Concierges,are to marry their only daughter to a butcher's boy .Both the in-laws and the groom have an obsession:come what may,they are keen on honoring their engagements :promises are made to be kept is their motto.And when,on the wedding day ,the unfortunate parents cannot provide the newly weds with...the "Mérinos" mattress which is part of the bride's Trousseau,they are desperate .The husband will spend the whole wedding festivities trying to keep his word.