The CSI team investigates when a body is dug up in the luau pit of a Hawaiian-themed hotel. Internal Affairs begins to question Grissom and Sara's return to the crime lab.
An abandoned horse covered in blood leads the CSI team to a halfway house for convicted murderers; Grissom and Sara begin to circle their prime suspect in the David Hodges case.
When the team is called to investigate human remains found in a convention centre owner's bathtub, Sara and Grissom use the case to get close to attorney Anson Wix's star forensic expert witness, just days before David Hodges' trial begins.
When David Hodges goes missing, the CSI team searches for any piece of evidence that can help locate him, clear his name and save the reputation of the crime lab.
The CSI team is puzzled by a mysterious footprint that is found near a crime scheme. They work to determine who or what killed a father and his son.