Serena was originally the daughter of the richest man. Because of a kidnapping, she was rescued by the ace sniper Evan Wilson. This bullet changed the fate of both of them. Serena decided to hide her identity and join the police force to realize her dream. Evan Wilson was unable to save his wife because of this rescue. His wife's death caused him to become a homeless man. The destinies of the two intersected and they redeemed each other. With the help of Serena, Evan Wilson untied his knot and picked up the sniper rifle again. Evan Wilson also helped Serena become a real sniper. After the true identities of the two were revealed, those who bullied them regretted it.