A bartender from a popular dance club is in shock when he wakes up to find that the girl he spent the night with is lying dead next to him. Gibbs and his team are immediately called in when it turns out that the deceased is a petty officer who has been murdered. To confuse the investigation even further, the bartender denies that the woman found in his bed was the one that he initially took home.
The team enlists an old friend when a crime boss is murdered, triggering revenge killings across the island; MacGarrett and Danny work out details concerning their new restaurant venture.
Catherine and Nick investigate the deaths of two women who underwent the same unorthodox anti-ageing procedure. An apparent case of accidental poisoning turns out to be more than meets the eye.
When a mystery hit squad take out a Special Agent, the team jumps into action in attempt to prevent further loss of life.
The CSIs are called to the scene when chef Megan Hamilton is stabbed in her apartment. During the course of the investigation, the team uncovers a series of robberies - but when Russian gangster Ivan Sarnoff is connected to the case, there are disastrous repercussions for one CSI.