Two caterpillar friends love what they have in common--lots of legs and a talent for chewing leaves into funny shapes. And when it's time to build cocoons, they hang theirs side by side. "Happy metamorphosis," says an older, more knowledgeable butterfly. And it is a happy metamorphosis indeed--for when the two emerge from their cocoons, they can fly! But so much else has changed--as one is now a moth, who flies by night, and the other is a butterfly, who flies by day. How will things work now? Fortunately some things never change--like true friends figuring out a way to be together, and happily flying into the sunset and sunrise.