BLUE IS THE WARMEST COLOR centers on a 15-year-old girl named Adèle (Exarchopoulos) who is climbing to adulthood and dreams of experiencing her first love. A handsome male classmate falls for her hard, but an unsettling erotic reverie upsets the romance before it begins. Adèle imagines that the mysterious, blue-haired girl she encountered in the street slips into her bed and possesses her with an overwhelming pleasure. That blue-haired girl is a confident older art student named Emma (Seydoux), who will soon enter Adèle's life for real, making way for an intense and complicated love story that spans a decade and is touchingly universal in its depiction.