This full length feature includes all episodes of Kingdom of Plants. David begins his journey inside the magnificent Palm House, a unique global rainforest in London. Here, he explores the extraordinary plants that are so well adapted to wet and humid environments and unravels the intimate relationships between wet zone plants and the animals that depend on them. It was in the wet zones of the world that plants first moved on to land and in the Waterlily House David reveals how flowers first evolved some 140 million years ago. As the seasons change, David demonstrates how plants operate on a different time scale to us; how they modify their lives according to the time of year. We discover insects' hidden links with plants, both as pests and pollinators. UV-sensitive 3D cameras reveal the invisible alter-ego of plants and their flowers' mesmerizing patterns; a parallel-dimension of strange colours and stunning patterns through which plants communicate with them. Cracking the code to plants' survival strategies is the key to protecting their future and Kew have built a high tech long-term solution fifty miles south of the Gardens. Described as mankind's ultimate insurance policy, and with 10% already safely stored deep frozen, Kew's Millennium Seed Bank has the capacity to store seeds from the vast majority of remaining species of plant on the planet, thus saving plants from extinction in the future.