When a newly orphaned baby in the moon makes friends with the children of Earth, he begins to shine as brightly as possible to ward off their fears.

Before Jack Frost was Jack Frost, he was Nightlight, the most trusted and valiant companion of Mim, the Man in the Moon. But when Pitch destroys Mim's world, he nearly destroys Nightlight too, sending him plunging to Earth where, like Peter Pan, he is destined to remain forever a boy, frozen in time.