Hélène and Marie are twin sisters. They meet up with their stepfather, Daniel, to help him empty the family home following the death of their mother. Over the course of a weekend, they will have to rebuild their relationship.

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 young homeless actor wanders in Paris and tries to find the way in his life through unexpected meetings, which will challenge and change his vision of humanity.