Detective Nicholas Zelinsky and Captain Dale Henry investigate a multiple-murder scene in the desert outside Los Angeles. They receive a visit from Agent Dixon from the FBI, and they show him around the crime scene. Zelinsky, Henry, and Dixon all put on gloves, protective suits, and breathing masks because the crime scene is a cook house for crystal meth. The four victims are suspected members of the Saints & Sinners motorcycle gang. Three of them were shot in the heart with arrows, while the fourth had his hand cut off and pinned to the wall with a knife. Additionally, nothing was stolen, and it's clear that none of the victims fought back. The detectives are amazed that the assassins were able to enter the premises unnoticed. Agent Dixon reveals that the murder scene resembles the third panel of Hieronymous Bosch's famous Renaissance-era triptych "The Garden of Earthly Delights." He shows Zelinksy and Henry a copy of the painting, which has arrows and a severed hand. He explains that the FBI has investigated two other similar murder scenes in the past 15 months, each of which recreated a part of Bosch's third panel. In each instance, the victims have been purveyors of human misery: human traffickers, members of a Chinese triad, and meth dealers. The murders are performed by a group that calls themselves T3P (The Third Panel) and believes they are doing the work that law enforcement fails to do. Right after Agent Dixon leaves the crime scene via helicopter, a car arrives with a man claiming to be the real Agent Dixon. Zelinsky finds a message on the back of the copy of the painting and realizes that the man from the helicopter was part of T3P. Since he wore gloves, he didn't leave any fingerprints for them to identify. They watch the helicopter fly away, realizing that it is too low for the FAA to pick up on radar.