In the vibrant heart of Paris, two of the most unexpected heroes emerge to save the city from a new threat. Just as the Eiffel Tower prepares to light up, an ancient enemy, unleashed by a dark power, seeks to sow chaos in the City of Light. Toxinelle, a young and bold superheroine with the ability to manipulate the poisons of nature, and Griffe Noire, who possesses the agility and strength of a nocturnal feline, are forced to join forces.