When a rapist proves a little too difficult to find for the FBI, Agent Eppes and Agent Lake utilize Agent Eppes' genius mathematician brother, Charlie, to discover the rapist's point of origin.

Dr. Larry Fleinhardt's former college days friend Jonas Hoke, the Senior computer-science researcher, who develops for Robert Oliver's firm Lorman group with gifted college drop-out Scott Reynolds a classified program to evaluate government projects, is murdered in his Hollywood Hills home; data were stolen from his computer, which only contains a coded program for analysis of baseball statistics. Hoke's financial divorce complications seem irrelevant, although his wife had a relationship with their security system installer Lucas Grant. However Charlie finds that Hoke actually used the same kind of advanced statistic analysis and performance prediction on other data, cleverly masked under meaningless baseball numbers: Hoke applied this method cutting-edge to calculate human performance prospects in real life, based on various governmental and other data, potentially far more valuable...

Singer Skyler Wyatt reports a knife-wielding intruder in her home. The break-in seems to be connected to the hate mail she has been receiving for the last three months. Don begins to investigate and the body of a paparazzo is discovered overlooking Skyler's home. Don brings in his brother Charlie to analyze the hand-written hate mail and to try to determine where the strange photographs found on the dead body were taken. As the investigation proceeds the brothers are drawn further into the murky world of the paparazzi and celebrity stalking!

Charlie's hacking skills are put to the test when the team tries to rescue hostages on a bus. Meanwhile, Alan chafes at his first experience with the think tank model.