First Aired: October 14th 2009
Status: Continuing
Runtime: 65 minutes
Action and adventureDrama

Kim Hyun Joon is an assassin who belongs to a top secret organization known as the "NSS" whereas T.O.P is an assassin who works in another secret organization located in the United States called "IRIS" and was ordered to kill Hyun Joon. Seung Hee is a psychological analyst who plays an important role in bring Hyun Joon into the "NSS." Jin Sa Woo is Hyun Joon's colleague and falls in love with Seung Hee as well but keeps this to himself.
Hyun Jyu Ni
Jo Ji Hwan
Jung Han Yong
Jung Ho Bin
Jung Joon Ho
Kim Gab Soo
Kim Hye Jin
Kim Hyung Jong