Just before the sun comes out, a boy named William rallies the other children, and they lock Margot in a closet down a tunnel.
The teacher arrives to take the class outside to enjoy their hour of sunshine while Margot is banging on the door.
In their astonishment and joy, they all forget about Margot and gleefully rush to play outside, savoring every second of their newfound freedom.
The children run back inside as the sun quickly disappears and it starts storming.
A 30-minute television adaptation was created, originally broadcast on the PBS children's series WonderWorks in 1982.