Three women in a Marseille apartment during a heat wave. They find themselves trapped in a terrifying and delirious affair and longing for freedom.

With a touch of blush and a few drops of lip gloss, Lucie is getting ready to start her training day to become a hostess at a motor show. A lifelong car enthusiast, she has the secret hope of being noticed by the prestigious EBBE brand.

Jeanne is traveling to Romania to celebrate her bachelorette party with her friends when she meets Nino and her family. They are worlds away from one another, yet for the two of them it is the beginning of a passionate and timeless summer.

10pm on a summer's evening. The sun goes down over the Place de la République in Paris. Lucie and Rio embark on an "urbex", descending into the city's abandoned underground networks. The two teens share their adventure live on social media. On a subway platform, two young lawyers are on their way to join some friends. They film themselves as they wait for the train. Nora and Djibril have just made love. While he heads off to work, she meets a friend for the evening. None of them yet know it, but moments later, a terrorist attack will change their lives, linking their destinies forever. In a few moments, they are about to enter the darkness. The fiction unfolds through three simultaneous video feeds, filmed on cellphones and available to all via social media.

In a world where digital technology has invaded our lives, some of us end up cracking. Addict or technophobe, with family or at school, at work or in love, SELFIE tells the comic and wild destinies of Homo Numericus on the verge of a nervous breakdown.