A first-rate professional robber and his crew hit San Fran in a string of strong-arm jobs. Joe convinces Nash to moonlight as a private eye, searching for the SF Giant's short stop's missing car.

Nash becomes the objective of mercenaries controlled by a Singapore billionaire and his American counterpart, locked in battle to capture each other's most prized possessions. Bettina wants Joe and Evan to investigate his fiancee's alleged affair.

Nash clashes with his new rival, Deputy Chief Max Pettit, who has assigned Cassidy to a dangerous undercover gig involving synthetic diamond smugglers and a deadly assassin working for the South African diamond cartel. Joe tries to back out of the house purchase; Cassidy and her new partner Rachel McCabe join the S.I.U.

Nash and a Federal marshal (Philip Michael Thomas) are taken hostage by a Miami drug lord who wants to exchange them for a witness who's scheduled to testify against him in court; Joe tries to get out of being audited by the IRS.