In the fall of 1963, Louise is a 13-year-old girl who lives with her widowed mother. Before she is set to leave for boarding school, she discovers a box belonging to her late father. The box contains secret documents in additions to condoms, but Louise thinks they are balloons. She also learns her father was a member of the secret order of Freemasons. While at boarding school, Louise attempts to explain to friends what the Freemasons are. The girls form their own version of a Masonic club. Meanwhile, Louise’s mother finds the box in Louise’s room and inadvertently thinks her daughter is sexually active. Louise learns her parents’ marriage was not what she thought it was.