Experiment Risky

In 1903, Dr. Bailey meets an extremely strange lady on the train, then listens to that they has died under mysterious conditions. Via a friend, he becomes familiar with the Bederaux family, all whom appear to become neurotic and secretive but the good thing about Alida Bederaux draws him to their circle...much deeper than he'd planned. Who's at risk from whom? Who's crazy? Who are able to fathom the obscure motivations?