Ten-year-old Chris is an avid reader who knows everything about time travellers. However, when a strange boy with a dragon egg in his hands literally falls on her head, claiming that he is from the Sun and is being hunted, it is clearly something beyond the scope of books. No matter how hard Chris tries to avoid mysterious adventures, a dragon hatches from the egg and won\'t leave her side. At the same time, the Sun is fading, and now all of humanity is in danger of turning into ice cubes without its warmth. Time is running out. Will Chris be able to trust a stranger and return the dragon home to save not only Earth but also the Sun?