When an unidentified woman is found dead on the set of the famous show Ka by Cirque Du Soleil, the CSI must study the inner workings of the show to find out what happened. The team also investigates what seems to be a suicide at a party held by Sam Braun. After the cases are solved and closed, Catherine and Nick go out for a dance, but Catherine ends up in a serious situation. Grissom and Sara then begin to investigate a murder where a detailed miniature model of the crime scene is found near the body.