sentences:  Instead of unfolding in the present and showing flashbacks of the past, the main narrative unfolds several months in the past and is interspersed with flashes of events that are taking place in the present.These flashes gradually reveal that Ellen's fiancé David has been murdered and that Ellen, while staying at Patty's apartment, appears to have been attacked.By the finale of the first season, the past-tense main narrative of the show has caught up with the flashes of the present, and most of the questions raised by those flashes have been resolved.