Lost in her fears and fantasies, a young woman writes in a notebook. A young man finds this notebook on a train. Suddenly, they find themselves in the heart of a forest, in a nocturnal reality where dreams come to life.

Summer time. Two teenagers, a boy and a girl, have their first date in a park. Hesitant and shy at first, they soon discover each other, get closer as they wander, and end up falling in love. But as the sun goes down, it is time to separate... And a dark night begins.