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 wonders why all the clouds come and cry over his village at the same time. What makes them so sad? He questions the wise old man of the village, who suggests that he wait till the end of the rainy season for the answer. Once the rains are over, Moko goes back to see the old man. The old man tells him that the answer lies in the fields and the crops. Moko sees that the rain has allowed so many things to grow, and that the village has all the food it needs. So he realizes that the clouds are not sad when it rains, but rather that they give all their water to fertilize the soil.