Romain Faubert is a 39 year old, single, medical photographer... and a raging hypochondriac. His doctor and only friend Dr. Dimitri Zvenka thinks he knows the cure for Romain: dating! But with the arrival of freedom fighter Anton Miroslav, everyone might get more then they bargained for...

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!