Daniel Dae Kim plays a spy who faked his own death in Butterfly. A case in point is Butterfly, a new Prime Video series starring Daniel Dae Kim as a spook who comes out of hiding to save his long-lost daughter. The result is an intriguing, frustrating hybrid in which a spy thriller plays leapfrog with a K-drama about fathers and daughters, mothers and sons. Kim plays David Jung, a former U.S. government spy who once owned a big private security and intelligence company, Caddis, with his partner, Juno — that’s Piper Perabo — a woman with the ethics of a spitting cobra. Fearing this enemy would harm his teenage daughter, Rebecca, he decided to fake his own death and hole up in South Korea.