Hanna is a happy little girl who loves her pom-pom, her blankie, and her singing teddy, and she really loves her twin sister, Joanna. So anytime Hanna gets sick and goes away to the hospital to "sleep like a polar bear," it can be tough for Joanna who misses her sister very much. Joanna's parents assure her that everyone has big feelings sometimes, and together, the sisters use their colorful imaginations to make a difficult situation bearable.