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, Alarick's country is very strange. It has been many days now that night has not fallen, and no one seems to be worried. Moko decides to head towards the horizon to see what is keeping the sun from setting and Alarick goes with him. Along the way, Moko tries to lull the sun to sleep with a lullaby from his country. The sun looks like it will set, but stops short and rises again. Perhaps the ocean is frozen at the horizon and is keeping the sun from setting. He decides to ask the fishermen and one of them responds that the world is filled with such mysteries and that it is more precious for him to learn the secrets of his friend than that of the sun.