Katie's friends have come for a sleepover, and telling a scary story seems like a good idea--until she has a dream about a monster under her bed, and she wakes up to find her lucky kimono missing.
Katie looks forward to celebrating her birthday at school, and then finds a way to make it even more special when her friend Pedro mentions that he has a summer birthday.
One cold, gray, winter day, Miss Winkle leads Katie Woo and the rest of her class on an imaginary journey, challenging them to find ways to complete their lessons on a sunny island, under the sea, or on the moon.