Water shapes the land and makes our world unique. Only water can be found on earth in three states of aggregation - gaseous, liquid and solid. This is what makes the molecule so fascinating. No other substance has been so studied and yet still holds so many mysteries as water. This film gives us insights into the fascinating landscapes created by water: Underwater worlds, ice worlds and cave worlds. But it also shows us the importance of water for the forest ecosystems, plant life, and for us as living beings.