A robbery of a gold shop 20 years ago changed the fate of two generations. As the son of the suspect, Ma Da was bullied but still grew up to be an honest and kind person with a dream of becoming a policeman. Unfortunately, he is only a security guard at the Public Security Bureau. Fortunately, he has a beautiful wife Liu Sijia by his side. One day, Ma Da suddenly received a call from his father Ma Che. He himself was accidentally involved in a major case of reselling cultural relics. The mystery was slowly solved...