A story about the behavior of a migratory gull (tern) that travels every year from Antarctica to the Arctic. It follows the adventures of Cappy as he battles fierce winds to find his summer home, searches for a new mate, fights off selfish skuas, befriends two Inuit children, Ory and Em, and starts his own family. At the end of each chapter, there is a question section that encourages readers to investigate and learn even more.