We meet the family. Doodle, Aunt Nicey, Mom and Dad, and lastly the narrator; the brother. We find out that doodle is disabled, staying in his room 24/7 practically paralyzed and that the brother isn't very fond of his brother.
They name doodle "William Armstrong" and he soon learns to crawl and proves the family wrong. He is now able to come out of his room and things are looking up form but the brother is still embarrassed.
The find the Scarlet Ibis sick and weak, it dies, and Doodle buries it.
A storm comes after Doodle failed to reach his goal, and when they were running, Doodle fell and his brother left him.
When brother comes back to find Doodle he is covered in blood, limp, and dead just like the Scarlet Ibis was.