山姆，一个聪明的孩子，离开家的山后被告诉，家庭的暑假旅行已经取消，从而阻止他做的藻类实验，他已经计划在那个夏天。这部电影记述了他独立的斗争，并与大自然的力量。

The Oscar® he won for Crac! allowed Frédéric Back to fulfil his dream of bringing Jean Giono's wonderful story The Man Who Planted Trees to the screen. In more distilled form, its environmental message and philosophy of life reflect the concerns already addressed by Back in his previous films. The seeds that the shepherd plants are the symbol of all our actions, good and bad, which have far-reaching consequences we can scarcely imagine. It is up to us to think and act in accordance with our hopes for the future, and, if possible, to leave behind us a world more beautiful and promising than the one we inherited.