A normal case which begins with the discovery of a businessman's bullet-ridden body aboard an empty yacht that smashed into a bridge has the team uncovering information that suggests that the dead man was delivering the ransom for his kidnapped son. The case soon takes a tragic turn when Speedle dies from injuries sustained in a shoot-out at a jewellery store, leaving the team devastated and more determined than ever to find out who is responsible.

The CSIs must find the killer after a young woman is pushed in front of a moving bus. Alexx finds a bruise shaped like a hand imprint on the victim's back, proving that she was pushed in front of the bus, and her boyfriend, Jay Seaver, is the prime suspect. When one of Jay's office rivals also turns up dead, Jay reveals that he has a psychotic stalker, Claudia. Meanwhile, Calleigh's father seeks her help when he fears that he may have killed someone after a night of drinking, and Horatio assigns a new CSI, Ryan Wolfe, to the case much to Calleigh's dismay.