The narrative follows four cousins—Nan, Mary Lee, Jack, and Jean—who leave Washington for Portland and then a mountain summer camp, where an episodic sequence of outdoor outings and small dramas unfolds. Camp life features canoeing, picnics, rainy-day mishaps, theatrical entertainments, a birthday celebration, a straw-ride, and moments of private discovery that strengthen friendships. Interwoven scenes of daily routine and lively incidents lead to farewells and new arrivals that alter the group’s plans, and the story closes with events that bring several personal relationships to a cheerful resolution.