On his 13th birthday, Ulysse is about to make a revelation.

Inspired by the adventures of Arsène Lupin, gentleman thief Assane Diop sets out to avenge his father for an injustice inflicted by a wealthy family.

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!

A woman at the age of 50 moves back in with her parents after her husband leave her for a younger woman.