The secret world of plants gets us closer to these motionless and quiet creatures, so attractive and surprising as the rest of the living creatures. The documentary reveals the most unknown aspects of the vegetable kingdom. We will learn about the secret of the eternal youth of a 3500 years old sequoia and be charmed by the 'rafflesia arnoldi' flowers, able to reach up to one meter of diameter. An exhaustive journey through the world of plants, from its domain over humid areas in mangrove covers, where they are able to live inside the water, to the most arid spots, conquered by the 'Welwitzia mirabilis', whose leaves reach up to six meter length .