A man tries that his wife fall in love with him again, after to wake up in an alternate reality where she never knew him.

Dumped over a video he made to amuse his ailing dad, a heartsick Jérémy hatches an elaborate scheme to win back his superhero-loving girlfriend, Lola.

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!