A wealthy man is shot just outside his penthouse suite. The investigation leads Danny and Lindsay to high school girls who disguise their age to meet rich men.
A poker player is beaten up when the other players realise he is cheating. When the host of the game is shot dead, Mac and Stella follow their only lead: the card cheat.
A man is found dead but the random pieces of evidence at the crime scene don't seem to make sense. The case takes a twist when the CSIs learn the victim was a stalker.
The CSIs are called into action when a fish merchant is found dead. Danny and Hawkes discover the man was impaled on a swordfish.