Detective Jesus Ramirez is a police detective of the Mexican Police Force in Mexico City. In Mexico, Rachel came for the detective's aid when Chloe, a chihuahua her aunt trusted her to look after, was taken. Soon enough, Sam and Papi came to Mexico to look for her as well, offering a reward for Chloe's return. Detective Ramirez's investigation started to have a lead on illegal dogfights that are hosted by Vasquez where he arrested him in the state of Chihuahua. After a suggestion of Chloe, Detective Ramirez accepts Delgado as police dog for his help rescuing Chloe
After hearing the involvement of the Anti-Hunters having a part of the deaths of Vasquez, his 2nd-in-command, Rafferty, and his other associates, Jesus, along with several law enforcement, became involved within the string of murders that's happening during the course of summer where he became a target of a novelist for her own personal benefit.