The narrative follows two new pupils, Ruth and Marjorie, as they enter a boarding school led by Miss Allen and confront the rivalries of a secret sorority while joining a Girl Scouts troop. School life is sketched through athletics, dances, tests, hikes, and social events that reveal shifting friendships and misunderstandings. A series of incidents—a stolen meeting, a mysterious cabin ghost, scouting demonstrations, and competitive games—raise suspicions and tests of character, leading to investigation, restitution, and a communal verdict. The plot resolves with reconciliation and a school play that restores harmony and affirms cooperation and responsibility among the girls.