Nightmare(2011)

Young surgeon Fang Lei (Zhou Xianxin) has been tormented by her weird dreams for many years. One day, she meets by chance her college best friend Angel (Gillian Chung), who is already married to Lei's ex-boyfriend Zhou Feng (Wu Jianfei). When grungy designer Wang Quan (Victor Huang) inadvertently enters Lei's life, a series of inexplicable things begins to happen - Feng suddenly disappears, and Lei finds herself being stalked by a creepy girl, while people in her dreams turn up dead in reality...