Temperatures across the Earth begin dropping to unusually low levels, and the Calico crew travel to the North Pole to investigate a UFO sighting, which they suspect to be connected to the temperature aberrations in some way. The crew then discovers that numerous icebergs are present, and the water levels are dropping at an alarming rate due to the freezing of the oceans. The source of the problem is also discovered hidden in one of the icebergs, which turns out to be a spaceship containing an advanced race of cold temperature dwelling, semi-humanoid hostile aliens referred to as the Ice People, who hail from the frigid asteroid Frios. By using their ultra-sophisticated magnetic wave generators, the Ice People declare to the Calico crew their intentions to direct Frios to Earth, thereby causing the planet to enter a new Ice Age to make the world more palatable to the aliens for future conquest [actually, bringing such a large asteroid near the Earth would cause far more damage than a