A wealthy family's nanny is murdered during a lavish party. The investigation reveals the victim had just been fired from her job by the children's jealous mother and that $250,000 is missing from the house safe. The suspect pool grows bigger when the team discover a hidden camera in the room and that the dead nanny and a previous nanny both knew the combination.

While investigating the murder of a young woman, the CSIs uncover a meth lab in her apartment and an unscrupulous FBI agent with a secret life of his own.