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When an accident claims the life of her twin sister, So-yeon falls into a coma from which she awakes ten years later. However, a series of mysterious killings starts to take place upon her recovery, and she seemingly takes on her sister's personality traits. However, it is revealed that the one killed in the lake 10 years ago was not Hyo-jin but So-yeon and the living twin is truly Hyo-jin. The secret is hidden by her mother, who tells the villager that Hyo-jin is dead, but the dreadful spirit of Fake Hyo-jin (So-Yeon) comes back to take someone to live underwater with her

How to Watch The Evil Twin Legally and Safely

If you want to stream The Evil Twin through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry The Evil Twin films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.