Millicent has grown up and it is now time for her to find her own home. On her search she comes across a big red barn and determines that she will live in this barn. While looking around she is being called and looking up, in the tree next to the barn, sit two little hummingbirds. They introduce themselves, Anna and Andy, they are sister and brother. Millicent tells them they can call her Milly. They become friends and play together all the time. One day Andy seems sad so Milly asks him why. Andy says he would love to have her fly with them on their adventures. Well, everyone knows a mouse does not fly, but Anna and Andy don't let that stop them. They build wings for Milly and teach her how to fly. Their friendship grows every day, and if one did not know better you would think they were sisters and brother. Even though mice do not fly the three of them did not let that stop them, and they proved that if you put your mind to something you can do it