Frozen Star Chronicles

The last ice age was caused by an asteroid hitting the earth. In order to cope with such uncertain changes, humans began to build underground cities. But one day, a completely frozen small planet appeared in the solar system, and was inexplicably captured by our earth, becoming the earth's second natural satellite... How does this make sense! But this frozen planet happens to be a perfect testing ground. How to survive in real ice and snow, a pioneering road is placed in front of mankind...