Tsuguha Chifuyu is a 17-year-old Japanese orphan who is known to be mysterious and astute, famous in Paris as the Alabaster, a masked delinquent who enjoys messing with the police without revealing his true identity. One night, he meets Evening Anderson and started to form a friendship with her. Their secret meets didn't last long because of Eve's father, who is a senior investigator, Taylor Anderson. Eventually, Chifuyu began working for Taylor to finish cases around Paris, with the serial killer mastermind, The Reaper as their main investigation. Taylor begins to learn more about the mysterious Japanese boy; his mood swings, his intelligence and professionalism in a crime scene, his mischievous and self-confident side, how he is unreadable and many others, eventually how well he conceal his secrets from others around him.