With their respected colleague Josh Folsom under arrest for the death of Kahn Schefter – the man responsible for killing Folsom's mother – the CSI team combs through every crumb of forensic evidence to determine his innocence or guilt.

The CSI team is called to investigate when the bodies of Frank Sinatra and Joey Bishop impersonators are discovered behind the drywall of a home construction project. Also, Folsom must face the review board about the future of his career.