That specific performance was a featuring:

A chaotic, modern monster who kills simply because he can. 🌏 A Global Noir

: Reviews specifically analyzing Lee Jung-jae's stylish performance as "Ray the Butcher". Critical Reception Rotten Tomatoes : 95% Critics Score / 81% Audience Score

Before understanding the Bilibili hype, one must understand the raw mechanic of the film. Deliver Us From Evil follows In-nam (Hwang Jung-min), a government-sanctioned assassin trying to retire. His last job in Japan goes wrong, leading to the kidnapping of a young girl connected to his past.

His ex-lover is murdered in Thailand, and her daughter is kidnapped.