Aaron finds a pigeon with a broken wing, he brings to home to help it. His family said that he can keep him temporarily. He builds a splint for the bird, and cares for it.
When Aaron's grandma's birthday started to come up, he decided he would give her Pidge, because she once had a pet goat, who was killed by Cossacks. Carl asks Aaron if Pidge could be the gang mascot, wanting to fit in Aaron starts to go.