The stain will form the shape of the murderer's face

There's a serial killer who rapes and kills young women at large. The police have dozens of suspects, many of whom they beat to get a confession, but more bodies pile up and everyone is helpless. Based on a true story of South Korea's first serial killer. Memories of Murder (2003) is equally good as Bong Joo Ho's acclaimed Parasite (2019). Tragedy, suspense and black humour in such a perfect harmony.