The Wor t of Evil K-Drama: Plot, Ca t, Ending & Romance

The Worst of Evil reframes the classic undercover cop narrative as a noir tragedy, set in the 1990s. It’s a crime action thriller noir that throws a rural cop into the heart of a drug cartel, with all the moral ambiguity that implies.

Release year: 2023 · Genre: Crime action thriller noir · Starring: Ji Chang-wook, Wi Ha-joon, Im Se-mi · Streaming platform: Disney+ · Setting: 1990s South Korea and Japan

Five key facts trace the identity and appeal of The Worst of Evil:

Is Worst of Evil kdrama worth watching?

What are the strongest aspects of the drama?

• According to But Why Tho? (entertainment review site), the series is “one of the strongest dramas of the year” thanks to a winding story of two men irreparably connected to each other. (source)
• The Review Geek (TV critique platform) calls the show “entertaining” and says it keeps viewers on the edge of their seats during suspenseful moments. (source)
• The 1990s setting creates a pre‑smartphone, analog policing and nightlife environment that adds tension (But Why Tho?).

What do critics say?

• Critics praise the cast performances, especially Ji Chang‑wook and Wi Ha‑joon (The Review Geek).
• The Fangirl Verdict (fandom review blog) noted that the violence in The Worst of Evil is less graphic than in other recent K-dramas like Moving. (source)
• Wikipedia classifies it as a noir thriller, not just a standard action series.

This verdict places the series among the year’s best crime dramas.

For similar dark thrillers, check out our analysis of Dexter: Original Sin Canceled: Why and What’s Next for the Prequel.

Is Worst of Evil happy ending?

How does the story conclude?

• The ending is tragic — not happy. Final episodes involve betrayal and sacrifice (But Why Tho?).
• The protagonist’s undercover mission ends in a way that leaves some questions unanswered (The Review Geek).

What is the tone of the ending?

• Emotionally devastating, often described as one of the saddest endings in K-drama.
• Comparable to The Smile Has Left Your Eyes in terms of tragic impact (The Fangirl Verdict).

The implication: viewers looking for a feel‑good resolution should look elsewhere — this ending is designed to linger, not comfort.

Is there romance in Worst of Evil?

How is the romantic subplot handled?

• Romance exists but is entirely secondary to the crime plot (The Review Geek).
• Jun‑mo’s wife, a detective, has a past connected to the drug king – complicating the undercover mission (The Review Geek).

Is the romance a major element?

• No. The thriller and noir elements dominate. Romance is used as a narrative device to deepen the moral conflict, not as a central theme.
• The series is not a romance drama; it’s an action thriller with a relationship subplot.

The romance subplot, though secondary, deepens the moral conflict.

What is the story of The Worst of Evil?

What is the premise?

• Rural police officer Park Jun‑mo goes undercover to infiltrate a drug cartel that is spreading a new drug called “Gangnam Crystal” through city nightclubs (But Why Tho?).
• The investigation involves cooperation between South Korea and Japan, with illegal drug trafficking spanning Korea, China, and Japan.

Who are the main characters?

• Park Jun‑mo (Ji Chang‑wook) – an undercover cop forced to befriend the crime boss.
• Jung Gi‑cheol (Wi Ha‑joon) – the cool, charismatic drug kingpin.
• Yoo Ui‑seon (Im Se‑mi) – Jun‑mo’s wife, a detective with a hidden past connected to Gi‑cheol (The Review Geek).

What is the setting?

• 1990s South Korea with elements in Japan. The analog era means no smartphones, making policing more resource‑intensive and dangerous (But Why Tho?).

In essence, the story is a tight undercover thriller with no easy answers.

Which kdrama has the saddest ending?

Is The Worst of Evil considered one of the saddest?

• Yes. Its tragic conclusion often appears on lists of K-dramas with the most devastating endings (The Fangirl Verdict).
• The emotional weight comes from the irreversible choices the characters make.

What other K-dramas have tragic endings?

• The Smile Has Left Your Eyes is frequently compared alongside The Worst of Evil for its heartbreaking finale.
• Other notable sad endings include Uncontrollably Fond and Moon Lovers: Scarlet Heart Ryeo.

The catch: if you measure a drama by its ability to make you cry, The Worst of Evil earns a top spot — but it’s not a tearjerker in the melodramatic sense; it’s a cold, noir‑style tragedy.

“The series is one of the strongest dramas of the year.”

But Why Tho? (entertainment review site)

“The show keeps viewers on the edge of their seat during suspenseful moments.”

The Review Geek (TV critique platform)

“The gore in Moving was harder to watch than in The Worst of Evil.”

The Fangirl Verdict (fandom review blog)

For fans of dark K-drama crime thrillers, the choice is clear: The Worst of Evil delivers a tense, morally complex story that stays with you. But if you need a feel‑good escape or a love‑driven plot, look elsewhere — for fans of Ji Chang-wook, this one leaves a scar.

If you liked the noir style, check out our guide on I Know This Much Is True: Book Plot, True Story & Review.