When campers see three skeletons dumped in the woods, Nick and Russell investigate and find many beetles on the bones. The victims are identified as the attorney Malcolm Turner, acquaintance of Catherine and recommended by her to her friend Laura Gabriel that is missing; his receptionist Amelia Gross; and his intern Julie Blanch. Their further investigation shows that they worked in his office until last night and the beetles are genetically modified to eat a body in a few hours but not reproduce. Sara, Morgan and Det. Vartann go to Turner's office that has been professionally cleaned, but they find evidence of blood. The security footage shows the assassins and cleaners meeting his leader. The prime suspect is Mark Gabriel and Catherine summons FBI Agents McQuaid and Pratt. When Catherine's mother receives a card from Laura, Sara finds a hidden memory card inside and locates where Laura is. When the LVPD and the CSI arrive at the house of Laura's cousin, they find her and her husband shot dead, and Laura hidden in a space underneath the kitchen. Now the FBI is protecting Laura that has agreed to testify against her husband. But Mark Gabriel is a dangerous man.
—Claudio Carvalho, Rio de Janeiro, Brazil