Las Vegas's retired police commissioner Duke Rittle was tortured to death after an 'exclusive' party. The ex-con who drove him is found murdered in the car's trunk, but not the last on Grissom's trail. Rittle's young daughter Sasha is missing and the suspect, a socialite chameleon, is seen on a private flight to Miami. Grissom sends Catherine there. Luckily Horatio takes brilliant charge, realizing it's the MO of a Florida serial killer of socialite couples, who spared the girl but eliminated all other witnesses and clearly isn't done yet, even sets a trap for the police.