Laura Lee Hope

All the Bobbseys are geared up for the upcoming gymnastics competition, but the fun turns sour when someone tries to sabotage star athlete Mary Lee Chin, and Bert and the other Bobbseys try to catch the culprit

When the Lakeport figure skating contest Flossie has entered is marred by sabotage and all evidence points to Flossie, the Bobbseys investigate to find the real culprit and clear their sister's name