Young Momo faces a difficult ordeal — moving from Tokyo to a town on the edge of the country. But along with the expected and understandable difficulties, something quite strange and, one might say, supernatural is suddenly added — events that could never have been imagined in the bustling capital burst into life on the quiet island. Trying to cope with them will lead the girl to discoveries, among which will be the solution to the mystery of a letter once written by her father — a letter consisting of just two words: “Dear Momo.”