The film tells the story of two generations of anti drug police officers, father and son, who work tirelessly to eradicate drug trafficking groups. The protagonist, Song Wentao, infiltrates the drug trafficking group and becomes an undercover agent. Together with the anti drug police, they break through numerous mysteries and spend a long timeThe story of the meticulous layout between the two, ultimately bringing drug traffickers to justice, overcoming evil with justice, and achieving self growth and transformation.