A great lover of trees, and indeed a tree surgeon himself, Jonah comes to a deep appreciation of their symbolism in a magical voyage. An accident puts him in a coma but he is given the opportunity to find out more about himself and the life-enhancing properties of trees of many varieties in an extraordinary journey. Each tree type has its own special benefits but also dangers, which give Jonah a heightened awareness of how best to live.
In short episodes, Jonah encounters the personifications of Britain's main tree species and learns hard lessons about love and death. Along the way, he falls in love with the beautiful Aurora, the embodiment of the Northern Lights, and is faced with choices between the spiritual and the temporal spheres. This is a pagan allegory for the modern world.