Kim Shin, a special killer who gathered men from all over the country and made the Organization 'Baek-Yi' to destroy the absolute power 'Castle' of the underworld.

Through a negotiation he got inside the Castle and started working with the enemy... Will Kim Shin be able to take down the Castle and complete his revenge as he hoped.

"Castle", South Korea's omnipotent crime syndicate. One man returns to Korea in order to topple the absolute stronghold that is "Castle". Kim Shin, the Korean-born Russian killer named "Amur Tigro".
He comes back to the crime-ridden city of Hoe-Am in accordance with the last will of his mentor, Kang Min Sung. Kim Shin and his comrades put their lives on the line as they head for the final showdown…