Ibrahim came to Spain from Guinea Conakry and now his roots are in Madrid, where he lives with Mariama and works as a bricklayer. One day, the police arrest him and Ibrahim, who lacks a residence permit, is deported to his country. From that moment on, his only objective will be to return to Spain to reunite with Mariama and her daughter about to be born. After managing to cross Africa, he settles with some companions in Mount Gurugú, an immigrant camp that separates Africa from Europe. There he meets Aminata, a girl determined to jump the fence and reach Spain. But that is a physical feat that is not within everyone's reach.
A few months after May '68, Robert, a graduate of the Ecole Normale Supérieure and a far-left activist, decides to get a job at Citroën as a line worker. Like other comrades, he wants to infiltrate the factory to rekindle the revolutionary fire, but the majority of workers no longer want to hear about politics. When Citroën decides to pay back the Grenelle Agreements by requiring workers to work 3 hours overtime per week for free, Robert and some others see the possibility of a social movement.