When three teenagers are murdered while stapling posters, one on the tree and two on the ground. Grissom and Nick arrive at the crime scene and do not find any identification of the teenagers. Using the serial number of a rod of a custom hydraulic cylinder, they reach the name of Jeremiah Calvin and Nick and Warrick keeps his residence in stakeout. Soon they learn the rappers Dollar and Hi-Def have a beef, and the detectives and CSI team interview rappers, managers and crews to find the criminals.
—Claudio Carvalho, Rio de Janeiro, Brazil