Adaptado do romance best-seller de Geneviève Pettersen, La déesse des mouches à feu, A Deusa dos Vagalumes se passa na década de 1990 e conta história de Catherine, uma adolescente que mora em Chicoutimi e está passando por um período difícil, em que descobrirá o sexo, drogas, amor e a morte.
Navigating the treacherous social tides of high school, Marine is cut adrift by Océane, her older sister who’s caught in the thrall of an older man. Meanwhile, their mother struggles to keep her head above water.
It has kidnapped Roxane Labelle, a Canadian singer covered gold records and awards. To his captors, no question of release without payment of a large ransom. Father and manager of the star, Paul Labelle asks a small accountant do it. Easier said than done, especially the payer also has a large sum to the Mafia and, rapidly, what Québec account scoundrels, thieves and killers are chasing the fabulous bonanza.