Firefly Summer is an enchanting poetic recreation of life in rural Puerto Rico at the turn of the century. Returning home to her parents plantation for the holidays, a young student rediscovers the quaint customs, music and lore of country folk, and the lush verdant beauty and lure of the tropical hills. Teresa is honored when her family initiates her in their traditional rites and celebrations that mark the seasons of the year as well as the stages in peoples lives.
However this idyllic journey is not without intrigue. Unknown to Teresa and her best friend from school, there is a real-life mystery unraveling concerning the foreman of the plantation who was raised by the family since early childhood. In the course of their sleuthing, the three young people discover the challenges of approaching adulthood. The events of the summer bind the trio in a lasting friendship.