Two friends who meet again after 10 years, two very different couples, a dinner and a big misunderstanding... for a "surprising" sequence.

That very morning, Christophe ran into an old college friend, Jean-Luc, the future groom, who, overjoyed to have found this friend from back then "who imitated teachers really well!", rushed to invite him to dinner. But, for some unknown reason, when Christophe arrives with his girlfriend Patricia, she gives him the cold shoulder and seems determined not to open her mouth. As a result of her silence, Jean-Luc and Nathalie, his future wife, who are very naive, take her for a stranger.