The episode opens with Mrs. Rusty Wren asking Grandfather Mole if he has found his grandson yet. Grandfather Mole is initially unaware that any of his grandchildren have strayed from their underground home. Mrs. Wren describes seeing a tiny chap wandering in the garden, which leads Grandfather Mole to identify the missing child as his smallest grandson, Moses. Grandfather Mole expresses immediate concern about the garden cat potentially catching the young mole. Mrs. Wren observes that Grandfather Mole is greatly disturbed by this news. Despite having her own family to care for, Mrs. Wren offers to help Grandfather Mole find his grandchild. Grandfather Mole appreciates her kindness and acknowledges that he lacks her bright eyes for searching. Mrs. Wren explains that she wouldn't want her own youngsters wandering alone in the garden. She advises Grandfather Mole to stay close to his hole to avoid risks while she searches. Grandfather Mole agrees to take her advice and stations himself by the hole. The episode establishes a cooperative dynamic between the two characters with different capabilities. It creates tension around the safety of a vulnerable young animal in a dangerous environment. The story explores themes of community assistance and inter-species cooperation. The narrative maintains a gentle, children's story tone throughout. The characters demonstrate concern for family members and willingness to help neighbors. The setting is a garden with both underground and above-ground elements. The episode ends with the search beginning but the outcome not yet revealed.