Danny, a professional killer, has reached retirement age but still thinks he is a leader in the industry. He is pursuing Anna, the club manager, as he has made little progress in his work. One day, Danny suddenly received a mission from the organization. He was very excited about it, but found out that he was just going to train the newcomer Will. Although Will is gifted and capable, he also has a strong personality and is difficult to tame. This mismatched pair of partners was asked to get rid of a senior member of the criminal group. Although the two have very different personalities and dislike each other, they will cooperate with each other for the mission. What the organization did not expect was that Danny's experience and the talent of this child established an unexpected tacit understanding between the two. This tacit understanding, coupled with Anna's important help, made the three discover the true purpose of the organization. They found that the organization actually wanted to complete its internal renewal, not only using them to get rid of opponents, but also to replace the three of them later. The three people who learned the truth joined forces to destroy the organization.