From the California desert to the rainforests of Alaska, naturalist and writer Louis-Marie Blanchard embarks on a 5,000-kilometer journey in the footsteps of ecological pioneer John Muir. Through the iconic landscapes that Muir helped to save, he meets the men and women who continue his fight to preserve the wilderness. A journey of initiation, poetry and commitment, driven by a deep and intimate admiration for the man who changed his life.