The CSI team investigate when a body is dug up in the luau pit of a Hawaiian-themed hotel; Internal Affairs begin 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 are 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 team search for any piece of evidence to help locate him, clear his name and save the reputation of the crime lab.
A mysterious bigfoot-like footprint found near a crime scene puzzles the team as they work to uncover who or what killed a father and son.