The CSIs investigate a wealthy man found stabbed to death in Madison Square Park. Across town, the rest of the team investigates the shooting death of a woman found outside the Metropolitan Museum of Art. A makeshift ballistic experiment, using an improvised slingshot and a slug reveals that the victim was actually shot in the chest and that she herself was the attacker in the crime. In an unexpected twist, evidence collected at both crime scenes links the stabbed man and the female victim. This ultimately leads Mac and the team to delve into the lives of two seemingly unconnected, high-powered female CEOs, who share the pain of being former victims. Both women commuted daily on the train from the suburbs into Manhattan, a routine that resulted in a long lasting relationship and a bond that lead the women to conspire to avenge two recent high profile cases in which the female victims' attackers were acquitted.
