Boundary Between Life and Death

At three o'clock in the morning, I received a text message from my girlfriend: "Help! He is right outside the door!" But I clearly remember that she had been dead for a whole year. The police ruled it a suicide, but I was the only one who knew it was murder. When I rushed to the apartment where she lived, I found another "she" standing at the door. "Did you receive the text message?" She asked me with a smile, "I received it too." "He said - one of us is a ghost."