Cui Dapao, the owner of the Northeast Bathhouse, accidentally picked up a son during a blind date and went home. Not only was he hopeless, but he also raised his son for others. Good brothers Erlong and Taozi helped each other out of their righteousness and enthusiastically helped Cannon bring the baby together.

A group of progressive youths from diverse backgrounds unite to form an anti-Japanese alliance, determined to stop the invasion and protect their country.