When a government scientist is poisoned and has only a few hours to live, she asks Jane to find her attacker.
A murder investigation turns into the search for a priceless ring stolen from a British museum; and the team meets the new boss, Madeleine Hightower (Aunjanue Ellis).
Jane tries to uncover the identity of a woman with amnesia, covered in blood, who stepped in front of Cho and Van Pelt's car.
Jane's conduct results in the case against a hit man being tossed out of court, forcing the team to begin the investigation over again.
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