Ai, a self-reliant girl who moves to Animal Village and works at Nook's Cranny, gradually becomes part of the community with guidance from its residents and embarks on a quest to plant pine trees for a Winter Festival miracle after finding a message in a bottle.
An archaeological expedition finds the mummified bodies of Genghis Khan and his army somewhere in Mongolia. Unaware that the location is cursed, the explorers wake up the former ruler of the Mongolian empire. He warns the intruders that a large calamity will befall the world in one thousand days. The only ones who can prevent this from happening are three persons who bear wolf-shaped arrow scars. They must join forces and kill the "three emperors" so that the Khan's soul can once again sleep for a thousand years.
Inside Mercury, Japan builds a large-sized solar space power plant. The plant supports Earth with its large solar energy supply but suddenly there is an abnormality at the Saint Elmo plant. To pinpoint the problem, Earth sends several technicians to fix it.
