Summer, ‘84. Manu arrives in Paris, where he shares a cheap hotel room with his sister Julie. He strikes up a joyous, chaste friendship with Adrien, a wealthy doctor in his early fifties who opens Manu’s eyes to a different way of life.
On a trip to the seaside, Adrien introduces Manu to Sarah and Mehdi, a young couple who have just had their first child. An unplanned love affair upsets the ordered tranquility of their individual destinies. Each of them becomes a protagonist in, and witness to, a contemporary tragedy, where those who survive may emerge stronger, but not undamaged.