The Roommate's Deadly Trap

Former roommates Nina Norton and Lila Taylor. Nina grows wary of Lila's behavior when Lila moves out. The spare key goes missing. Nina changes locks and installs cameras. Lila returns with the old key. Attempts to enter fail, her tactics grow frantic: fake orders, threatening notes. Police get involved. A blood-stained bag with a "shut up" warning appears. Their roommate relationship is a trap. Another manipulator is behind Lila Taylor. Who is really manipulating everything?