Set in 1896 New York City, 'The Alienist' follows Dr. Laszlo Kreizler (Daniel Brühl), a criminal psychologist, as he teams up with newspaper illustrator John Moore (Luke Evans) and aspiring detective Sara Howard (Dakota Fanning) to investigate a series of gruesome murders targeting street children. This gripping period drama blends historical figures, like Theodore Roosevelt, with fictional narratives, offering a dark and atmospheric exploration of early forensic science and the complexities of human psychology.