Gilbert, his brother Boule and some friends live in Estaque. Between carelessness, petty theft and social gloom, they feel like the outcasts of a society where Gilbert has no future. This is the "last summer" that he intends to spend there, dragging his idleness, nevertheless beginning a romance with Josiane, a nice worker.

Zine and Rayanne plan to flee to a dreamland, a fantasy haven on the north shore of the Mediterranean. The crossing is commonly made in fishing boats and other small craft; hundreds of harragas die each year. Zine embarks for Spain with a group of others, while Rayyane decides to stay back to raise more money for the crossing - which involves tricking his uncle into lending him money under the pretense of running a local business. But, like so many other working poor around the world, Rayanne refuses to weigh the danger against the prospect of a better world.

Elisabeth lives a quiet live in the Belgian countryside with her young adult daughter Elodie. After the divorce from her husband Elisabeth took care of her daughter on her own. When Elodie disappears over night and Elisabeth discovers that she travelled to Syria to join the Islamic State, she begins her journey to find her daughter.

Paris, spring 2015. Faustine travels to Syria with her little son to join ISIS; but, once in Raqqa, she soon realizes the hell she is gotten herself into. Her husband Sylvain quickly understands that the French government is powerless to help him, so he plans with some friends a high-risk extraction operation to get his family back.