As the moonbeams dance through her bedroom window, a young girl named Sara finds herself face-to-face with a small mouse named Missy. A mouse who, along with her family, has been living in the young girls attic. With each passing night, Sara grows closer to Missy and the rest of the mouse family. That is, until the mouse family mysteriously disappears. Sara must rely on her sister's help to find the mice and bring them back in time to celebrate Christmas. But, will Sara and her sister be able to find Missy and the others in time?