When an unknown fingerprint suddenly appears on a piece of evidence in court, Grissom must re-open the case and find the real culprit. However, this unexplained phenomenon causes Ecklie to doubt Grissom's handling of the case. Ecklie then opens an inquiry on Grissom, and questions each of the CSIs about his effectiveness as supervisor. Meanwhile, Sara and Greg investigate the circumstances surrounding the death of a man who shot himself in the leg.