ane Rizzoli and Maura Isles find themselves investigating a death that occurred during the re-enactment of of a Revolutionary War battle organized by a university professor, Dwayne Cravitz. They soon determine that far from being an accident, the shooting was from a sniper who was actually out to kill Cravitz. A DNA sample leads them to believe that the shooter is someone from his past. Maura meanwhile is thrown for a loop when her mother, the rich and beautiful Constance Isles, drops in for an unexpected visit. They have a strained relationship however with Mrs. Isles not quite sure how to be a mother to her daughter and Maura feeling intimidated and reduced to babbling in her presence.

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