Sebastian has one ambition in life: to do nothing. His horizon is his couch. His life he does not want to live but contemplate. But today, if you do nothing – You are nothing. So driven by his two roommates, that chain internships and odd jobs, decided to Anna and not quite decided Bruno, Sebastien will have to – A little.

If Paris is the city of lovers, it is also that … ex! Antoine does not dare to commit, Didier regrets his ex-wife, Father Laurent must celebrate the marriage of his ex, Julie, Serge is harassed by Lise, the ex of his girlfriend of the moment, while Greg consoles With the dog … of his ex! So many characters whose lives will be telescoped in a joyful disorder and who could fall back in love! But of whom? Whether they obsessed us or loved to hate them, deep down, it is difficult to forget their ex!