Two capable detective, Dong Sik and Joo Won team up to solve a string of serial killer cases that seem to resemble serial-murder cases 20 years prior. As their investigation proceeds, they are forced to look far deeper than what the evidence suggests, questioning the liability of everyone involved within the investigation.

A story about choices and self-identity. Beyond Evil is a slow-burn psychological thriller full of eerie crime and corruption that involves an entire town. The story takes its time to tell the motives, behaviours and connections among the characters, the mystery unfolds very slowly and intend to be confusing. For that reason, I think it's perfect to binge it than watching weekly to keep feeling engaged and focussed. Trigger warning. there were many many suspenseful and gruesome scenes that I found quite disturbing.

The bonds that Dong Sik and Joo Won form between each other is another highlight of the show. Despite their initial mistrust, they are two people on the same side of the law who learn to walk that fine line between good and evil together. They both were obsessed with finding the truth. Aside from the two, all the other characters were significant. The police team is heartwarming and the villains are blood boilingly frustrating, as how they should be. Overall, it's a though, slow show, great performance and character developments.