The Warehouse agents have Stukowski under interrogation after finding out she's been stealing artifacts and using them to kill regents -- the secret protectors of the Warehouse. Three more regents are in danger when the building they are secretly meeting in has been enveloped by a corrosive energy and about to collapse. With no way out, Artie and Myka scramble to get the regents to safety, while Pete and Claudia hunt for Stukowski's partner in crime, who is in possession of a spray can used on the crumbled Berlin Wall. Mrs. Frederic employs questionable tactics to get Stukowski to talk, provoking Steve to pull a gun on his own boss.
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