In Shanghai during the 1930s to 1940s, gangs ran rampant, and drug trafficking was widespread. Drug lord Brother Chen held immense power, making it difficult for the police to gather evidence. Ren and Mei unexpectedly reunited during one transaction, but it was part of the intricate schemes of Brother Gui, Brother Chen, and the police. Amid suspicion and trials, Ren, an undercover agent for the police, infiltrated the criminal underworld and successfully helped the authorities apprehend Brother Chen and an international drug ring.
The professional bodyguard team of Jiang Nanying, Hu Lififei and Ma Yanni grew up together as sisters. 3 years ago, an action, because of Jiang Nanying's mistake, causing Ma Yanni's accidental death, full of guilt, Jiang Nanying withdrew from the bodyguard industry, until Hu Lififei found her ......
Tong Song, who is unable to walk, is the founder of Paradox Security. There are two other people in the team, An Ning, who is talented in mechanics, and Da Niu, who is simple-minded yet highly skilled. The company's main business is to protect the safety of their clients and their clients' property, also known as "bodyguards." On this day, they received a three-day anonymous commission to protect An Ning's sister, An Yi. Since then, An Yi has had ran into many accidents. Tong Song thinks it's not a coincidence, but he does find a clue in the details that confirms his suspicions. There is a high possibility that the organization behind this is one that is good at making murders look like accidents. Just then, An Yi disappears... Who is trying to assassinate An Yi? Is An Yi aware of the danger she's in? Is there really such an organization? How will Tong Song and the others save An Yi?
When the Japanese invaded China in 1931, the traitor Zhang Wenlin defected to the enemy and betrayed his country. Zheng Yi and other righteous men fought for the traitor in blood, but ended in failure, taking Zhang Lihua, Zhang Wenlin's daughter, with them. Fourteen years later, on the eve of the Japanese defeat. Zhang Wenlin is on tenterhooks and wants to move the looted relics and treasures to Switzerland. Zheng Yi, a guerrilla leader of the Resistance, and Zhang Lihua, a sniper, are ordered by their superiors to go down to the mountains to assassinate Zhang Wenlin and the Japanese commander to stop the flow of relics and treasures.