该片讲述了双腿残疾的童松是矛盾安保公司创始人，公司成员还有安宁和大牛，他们接到保护安宁妹妹安逸的匿名委托，安逸频生意外，童松发现并非偶然，可能涉及善于制造意外的组织，此时安逸却不见了的故事。
Tong Song, who is disabled in both legs, is the founder of Maodun Security Company. His team includes two others: An Ning, skilled in mechanics, and Da Niu, a simple-minded but highly skilled fighter. The company's main business is protecting clients' personal safety and property, commonly known as "bodyguards."
One day, they receive an anonymous three-day commission to protect An Ning's younger sister, An Yi. From then on, An Yi suffers a series of accidents. Tong Song believes this is not accidental and, sure enough, discovers clues in the details, confirming his suspicions. It may be an organization that uses staged accidents to kill people silently. Just then, An Yi disappears…
