The Angora Twinnies (whose name derives from their hand-knit attire) are twins - a boy and a girl named Donald and Pat - who live far in the North, and greatly enjoy their winter play. The drama of the story lies in their game of swinging over the sea, where a gull tries to tempt them to let go with promises of great adventures. The twins resist this folly, as they are “brought up right” and this gentle story ends with them sledding as an alternate, and safer, game.