A construction crew breaks ground at a site. They reach a wooden box buried in the dirt containing a man. The drill plunges into the box, killing the man. Later, Horatio looks over the body. The drill operator says that he couldn't stop the machinery in time. The operator says that today was the first day of work at the new site.

Calleigh and Tara examine the scene. Tara finds that the man was shot in the chest, then buried. Tripp says that he received a tip about a shooting of a man who matches the victim. Tara finds that the victim was carrying a cardio messenger that sends and receives signals from his pacemaker.

Tara brings the cardio messenger to the lab. Tara says that the victim was Michael Olvara, a reverend. Using the data from the cardio messenger, they see that the man's blood pressure spiked at 8:00 am and that he might have been shot at that time. They find that Mike died at 9:21.

Horatio meets with Freddie, a young man at Michael Olvara's work, which is a children's shelter. The man says that the Reverend helped him out. Horatio says that he learned that Mike helped keep kids out of gangs. The man says that someone recently vandalized the side of the building.

Eric examines the graffiti and sees that the tagger was a member of the Craeneos Rifa, a Latin gang. Eric also finds the word 'Zar' written in graffiti

Tripp brings the tipster, Yolanda Ramos, to meet with Horatio. Yolanda asks how much she will receive for the tip. Tripp says that she will receive from fifty to a thousand dollars if her tip is legitimate. Yolanda says that she heard a gunshot while she was working for her job placing flyers on cars. She says that she recognized Mike as the person who was shot then ran off.

Calleigh and Eric go to the scene that Yolanda talked about. Eric finds a pool of blood. Calleigh finds a spent 9mm casing. Eric finds a St. Jude pendant necklace in a stream of water near the sidewalk. Eric thinks that it belonged to Mike because St. Jude is the saint of lost causes. They figure that someone struggled with Mike, then ripped off his necklace.

Calleigh finds that the bullet found at the scene is related to a crime committed by a man named Hector Salazar. They see that Hector was released from prison a week prior. Horatio brings Hector to the station. Horatio asks if he killed Mike. Hector says that it is bad luck to kill a holy man. Horatio shows Hector the graffitti of 'Zar.'