Little Girl K is a short, but powerful drama about a young girl forced to become a part of a secret organization, while eager to revenge her closest family member's death. The lead Yun Jin is played by Han Groo and she definitely made an impressive debut to TV screen. Never expected her to be so powerful and strong on screen and I can't think of any other actress that could possible replace her. Like previous reviews said, the story itself is not really new as a person that lost someone is out for revenge, however the acting of the actors and the action (which it is full of) will keep you interested. I would definitely recommend you to watch it if you'd love series like IRIS or Athena, however I still wonder why Korean tv blurs out blades, while showing all wounds made by it clearly visible on screen.