In order to protect an employer he had never met before, he gave everything to himself. After grieving the loss of his beloved wife, Lei felt very frustrated that he could not find a wife, so he had to give up his love to work, leave his family and the crowd. One day, Ray was cheated by a friend and hired Lei to protect the health of any model star-Vicki. Because Weiqi's businessman father was involved in illegal activities, Weiqi was also involved in this violence. Gangsters from all sides hope to seize Weiqi to act as a human being, so that Weiqi's father can hand over the huge amount of money obtained by illegal activities. However, the matter became more and more serious, and as soon as it got out of hand, the Los Angeles police department decided to take over the case. Ray was also forced to withdraw from the guarantee duty at this time. As Lei and Vicky get along day and night, people have developed unspeakable feelings, and Lei is reluctant to realize that his feelings for Vicki are no longer just a relationship between employers and insurance. Therefore, at the end of the contract, Lei continued to protect Weiqi and found out the truth of the whole matter.