Rebecca, a Warehouse agent employed in the 1960s, returns and asks Pete and Myka to go back in time and close a case that she and her partner Jack were never able to solve – an artefact capable of turning people into glass, used by a man to kill three of his secretaries and his wife., Pete and Myka travel to 1961 via H.G. Wells’ time machine to stop a killer who is turning women into glass., Using HG Wells’s time machine, Pete and Myka travel back to 1961 to solve a string of murders. Artie, meanwhile, must adjust to the arrival of the new agent.