On the outside, Zoe looks like an ordinary little girl, but her father knows just how special she is inside. On cloudy days, they pretend that she has swallowed the sun, and then together Zoe and her father put it back up in the sky. After the terrible events of September 11th, Zoe decides she must secretly swallow the sun both to keep it safe, and to fill the void left by her missing father. As the days pass, however, the sun inside Zoe becomes too heavy a burden to bear. With her mother's help, Zoe learns to accept her father's death, and she puts the sun back in the sky where it belongs.