Mary and Blackie go on an adventure to find the fairies' treasure at the end of a rainbow. They meet Annabelle, a fairy who guards the treasure, and learn about the magic of rainbows.
Mary the Lamb helps a homeless white kitten find a home with Matilda, a good witch. The story emphasizes the importance of kindness and helping others.
On Christmas Eve, Mary helps Santa's top man, Tip, find a lost sack of toys. With the help of Matilda the good witch, they save Christmas for the village children.
Mary helps solve a noise problem between ducks and frogs by leading them to a wheat field with a scarecrow. The birds are scared away, and peace is restored.