After a temperamental meltdown on stage, Sean Hightower, a regretful and resentful "one-hit wonder" rock musician hoping for a comeback, returns to his girlfriend's condo seeking comfort from the woman he loves. But after letting himself in, he discovers her naked body on the bed, murdered from a bullet to the head. When the police detective arrives and sees the two taped pieces of paper on the wall with the word, "hello," on one and "goodbye,"...