Sweet Spy is an MBC TV drama series from Korea which is a hit in Asia and the United States starring Nam Sang Mi, Lee Joo Hyun, and Asian Heartthrob Dennis Oh (aka Dennis Wu, Dennis O'neal).

Synopsis:

Nam Sang-mi plays widowed police officer Lee Sun-ae who finds herself suddenly immersed into international espionage by Han Yoo-il Dennis Oh, an undercover agent. Lee Joo-hyun plays Kang-Jun, who’s recently transferred to the Criminal Investigation Department. He opens an old case involving Sun-ae’s past that leads him to an entanglement between the current political/economic powers and their secrets. One of them, oddly enough, being Han Yoo-il. Who is this man? Why is he here?

Cast:

Nam Sang Mi is Lee Sun-ae
Lee Joo Hyun is Kang Jun
Dennis Oh is Han Yoo-il
Yoo Sun is Park Eun-joo
Sung Eun is Choi Ji-soo
Kim Bo Sung is Detective Shim
Choi Bool Am is Choi Bum-koo
Ahn Yeon Hong is Oh Nara
Kim Min Jong
Kim Il Woo