Stream The Killer Downstairs Online Free – Watch Full Movie from Home at 123Movies. . Alison Peters has always done everything right but finds her life in turmoil as a lawyer stuck working at a grocery store job. Desperate for cash, she rents her basement on MiCasaSuCasa.com and gets a response from James Brewer who explains that he and his wife have recently split. At work, Alison and her friend Sarah, deal with a boss, Brandon, who's been harassing Alison. When Brandon is murdered, the police are suspicious of her. As romance starts to bloom between Alison and James, more people in her life begin disappearing.