After paleoclimatologist Jack Hall is largely ignored by UN officials when presenting his environmental concerns about the beginning of a new Ice Age, his research proves true when a superstorm develops, setting off catastrophic natural disasters throughout the world. Trying to get to his son, Sam, who is trapped in New York City with his friend Laura and others, Jack and his crew must travel to get to Sam before it's too late.

Karada is a young girl who hates being treated like a child and who wishes to be grown up. Shoko is an aloof, unhappy young woman who has just returned from overseas. When they meet by coincidence one night at a local shrine where they both like to make wishes, they exchange ages.