LOS ANGELES, May 29 (UPI) -- Katie Cassidy said she was drawn to her role in Speed Demon , in theaters and digital video-on-demand Sunday, for her strength in overcoming her traumas. Cassidy plays Sister Lu, a troubled nun riding a train on which a passenger becomes possessed. In the Catholic Church, only ordained priests and bishops are allowed to perform exorcisms. But, on the train, Sister Lu is the passengers' only hope. In a recent Zoom interview with UPI, Cassidy, 39, said Sister Lu's