Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko sees the sea for the first time. He thinks it is a huge river or a large lake. But when he tastes the water, it's salty. He wonders what sorcerer could have played such a dirty trick. He returns to his village and asks a wise old man to cast a spell to prevent the river used by the people from ever becoming salty. The old man assures him that it won't be necessary, that the river will never be salty. So Moko thinks that a well-meaning sorcerer must already be protecting the river--thankfully.