When a decomposed body is found in a gallon of dangerous materials, Grissom, Catherine, Nick, Sara and Capt. Brass investigate the case. When the DNA results come, they learn that the victim is the former army sergeant Christian Cutler. They identify that the drum came from a warehouse owned by Ginger Kellen and where there is a competition called Robot Rumble where robots are designed to destroy other robots. Meanwhile, Grissom, Warrick and Sam Vega investigate the death of Keith Mercer, who has been in the morgue for eleven days. They interview his wife and his partner, but they o not become suspects. When they check his cellphone calls, they find a lead.
—Claudio Carvalho, Rio de Janeiro, Brazil