The summary is as follows:
1. A young boy named Little Blue Hat visits his ill grandmother, taking flowers. On the way, he meets a wolf who tricks him into going alone to pick more flowers.
2. The wolf hurries to the grandmother's house, eats her, and waits in her bed disguised as her.
3. When Little Blue Hat arrives, he realizes it is the wolf. The wolf eats him but is discovered by a passing huntsman, who rescues the boy and grandmother from the wolf's stomach.