Hareez and Alice were talking with each other when Hannah came up. Hareez knew her and had had a bad past with her. Hannah was mean to Hareez in high school.
Hareez saw Alice died in the elevator and left the scene. Hannah who was passing by saw him and accused him of murdering her.
Hareez told Annie about his suspicions on Hannah and Annie believed him. They planned to avenge Alice's death.
Annie and Hareez secretly followed Hannah who was walking alone along the road and killed her.
Shelly who came to Annie's room saw Annie's wall filled with their pictures, knew the truth that she was the one who killed Alice and Hannah.
Annie met Hareez,who now regretted of killing Hannah. She then told him everything and the reason why she did it, to make him notice her. Shelly knew the truth and that Hareez was going to die next. Not telling anyone because afraid of getting hurt, she lost her sanity.