Robert drives his car along the country roads in the company of his two friends Antoine and Louis. He is obsessed with the incandescent feeling of his childhood love, Hélène. After several years of absence and many letters exchanged, he receives a final letter announcing her return. Passionate and unrestrained, Robert will have to face the resurgent memory, taking with him all forms of reasonable reality.

Cyril and Louise love each other dearly. Today they celebrate the fourth anniversary of their wild love. Tonight there will be a forest party. Louise and Cyril are planning to go. They don't know it yet, but it will be their last evening together, their last kiss, their last first love.