Soo is a 2007 South Korean neo-noir action thriller film directed by Yoichi Sai (also known as Choi Yang-il).

Soo was released in South Korea on March 22, 2007,[1] and was ranked fifth at the domestic box office on its opening weekend, grossing US$795,086.

Special kudos go to star Ji Jin-Hee, who sheds his romantic leading man reputation to become a believable killer who can stab and punch his way out of a fight.

Sai also sheds the expectations put on him after Blood and Bones by delivering an arthouse spin on a straightforward revenge film.

Choi's lasting imagery of water washing away blood suggests the pervasive human instinct to survive and the desire to purge oneself of one's impurities.