Jang Su-ro lives in the slums of Korea with his three sons 963, Dog Nose and So-and-So, who just got out of prison. While So-and-So's loyalties to his mob boss and biological family are put to the test when he finds that his family's home is slated to be demolished by the mob's developers, the rest of the family's life is complicated with the arrival of Sun-yi, Jang's new girlfriend who annoys Dog Nose and attracts the affections of 963.

Bernard works as a janitor at the National Agency but he dreams of becoming the 'greatest spy'. One day, unknown villains appear and threaten the earth with ice bombs. However, Bernard is the only one who can enter Polar Star, the base of the bad guys! Bernard is input with 'Super Brain Chip' and gets training to prepare him for this unexpected mission. His potential power slowly show itself. Will Bernard be able to defeat the villain leader White and save his earth friends?