In the bustling archives of her high school, Salma, a curious and imaginative student, stumbles upon a peculiar artifact that transports her back in time to 19th century Paris. As she navigates the unfamiliar streets, she nds herself attending a dinner party hosted by the brilliant but struggling physicist Marie Curie and her husband Pierre.

Enthralled by the Curies' groundbreaking work and personal struggles, Salma becomes increasingly entangled in their lives, uncovering hidden secrets and correspondences. As she delves deeper, she realizes her presence is altering the course of history, forcing her to make a choice: stay in the past and risk changing the future, or return to her own time and risk losing the lessons she's learned.