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The series is adapted from the Boom! Studios graphic novel Butterfly, created by Arash Amel, transposing the comic's espionage premise into a South Korea-set thriller for television.
Butterfly was filmed almost entirely on location across South Korea, and in recognition of the production Daniel Dae Kim was named an honorary citizen of Seoul. The city actively supported the shoot, and the series highlights Korean locations, crew, and language throughout.
For Kim, who was born in Busan, South Korea, and emigrated to the United States as a child, the project carried deep personal significance as a chance to tell a story rooted in his heritage. In addition to starring, he served as an executive producer and a driving creative force behind bringing the series to Korea.

Butterfly is a slick, globe-trotting espionage thriller on Prime Video, adapted from the Boom! Studios graphic novel by Arash Amel. Daniel Dae Kim — who also executive produces — stars as David Jung, a former United States intelligence operative living in the shadows in South Korea years after faking his own death. His carefully hidden life collapses when he is targeted by Rebecca, a lethal young agent from a shadowy private intelligence outfit called Caddis, setting off a relentless cat-and-mouse chase across the Korean peninsula.
The series' central twist reframes the pursuit as something far more personal than a routine assignment, binding hunter and hunted together through a buried family secret. Reina Hardesty plays Rebecca with steely intensity, and the show balances wall-to-wall action — foot chases, shootouts, and hand-to-hand combat through Seoul's streets and neon-lit interiors — with a genuine interest in identity, belonging, and the ties that survive betrayal.
Shot almost entirely on location in South Korea, Butterfly showcases the country as more than an exotic setting, weaving Korean language, culture, and craft into its DNA. For Daniel Dae Kim, born in South Korea and raised in the United States, the project was a personal milestone, and the series arrived as one of Prime Video's most distinctive action offerings of the year. It streams on Prime Video.
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