In a 1960s working-class neighborhood in Philadelphia, Pennsylvania, a teenage boy nicknamed "Birdy" befriends his next-door neighbor Al Columbato, and relates to him his fascination with birds and their ability to fly. The two begin pursuing Birdy's hobby of catching pigeons and caging them in a large, wooden aviary that he has built outside his parents' home. One night, they climb atop a refinery building, where Birdy hangs on the ledge to catch the pigeons roosting on it. Birdy loses his grip and falls several stories, but lands on a pile of sand. Slightly dazed, he tells Al that during the fall, he flew. After Birdy is hospitalized for minor injuries, his parents dismantle the aviary.