Mr. Thai is a retired police officer. Every day, he still goes looking for petty criminals. Hoang - a newly released drug lord opened a real estate business office. Mr. Thai was suspicious and decided to quietly investigate.

A drug squad attempts to take down a criminal organization and they must go undercover to do so, so they begin working at a chicken restaurant, that becomes famous for its delicious chicken. Due to the unexpected popularity, the detectives find themselves in a situation they never expected.

Four police officers open up a lobster restaurant as a cover in order to catch a notorious drug dealer, only to find their secret recipe is more popular than they expect. When they get caught up in their new business venture, they find a bigger conspiracy at work.