As bacteriologist Lena (38) drives past a burning car, she hears a scream of a dying woman. Lena does not tell her boyfriend how much the incident distresses her, just as she does not talk about the stillbirth she recently had. Instead, she throws herself into her work, intrudes into the life of the deceased, begins an affair with the widower and gradually takes on the role of ...手往她下面伸去，揉着，抽弄着，直到她润泽了，青树一直贴在他颈边低低喘息，直到他把自己送了进去，忍不住咽声求饶，“轻点啊，老是这样……”……