A pale, rather sickly Mr. Martin and his family arrive ready to enjoy their "beach holiday". Lindy and her young brother, Chris, explore the beaches and rock caves by the sea— they make a few friends who also explore the beaches and rock caves by the sea. The youngsters' adventures are less exciting than those of the famous Bobbsey Twins, but each day they have a glorious time on the beach. The parentless children are vaguely etched against an equally formless background in this book which is most assuredly not exciting reading— nor is it carefully written.