Two sisters discover a woolly bear caterpillar. One day, a curious friend shows up in Edie and Lou's vegetable garden. Woolly Bear doesn't say much, but she's just the quiet friend the sisters need: a tiny adventurer who quickly becomes part of the family. They build her a cozy home, feed her tiny thyme leaves, and sing her all the songs they know. Woolly Bear is the last thing they think of at bedtime, and the first thing they think of in the morning....