South Korea has produced some of the most eccentric serial killers in reality, movies, and shows. Shows like Signal, Mouse, Flower of Evil, etc., have sometimes mirrored real-life serial murder cases and sometimes been completely fictional. “Hyper Knife” (Original title: Haipeo Naipeu), starring Park Eun Bin and Sol Kyung Gu in lead roles, is a fictional medical thriller that places itself as the thesis and antithesis of two warring psychotic surgeons.

Written by Kim Sun-hee and directed by Kim Jung-Hyun, “Hyper Knife” follows two extremely skilled genius neurosurgeons who also happen to be dangerous killers. They kill people, sometimes rather unreasonably, while engaging in a war of words, gestures, and ultimately egos. Highly egotistical and overconfident in their surgical abilities, consistently trying to outwit the other, this mentor-student duo of Choi Deok-hee and Jung Se-ok goes through ups and downs in their relationship to the point of obsession. Their egos...