The film inspires and amazes and gives insight into the world beneath our feet. Besides the world above ground populated by plants, insects and birds, but especially by humans, there is a second world: an underground community of roots, larvae, worms, fungi, bacteria, amoebas and arthropods. The existence of this world will not surprise anyone, but the fact that all the life in that microcosm is busily communicating with each other is nothing short of astonishing.