A young girl, convalescing at home in her apartment complex, experiences a terrifying event. One night, as she idles away the time, Sakura is gazing out her window, through the drawn blinds. She witnesses a murder, a là Hitchcock's Rear Window. However, Sakura is unable to identify the killer because he or she is masked. As the hunt for the masked slasher begins, the recuperating Sakura is torn as to what to do. Seeking wisdom, she begins to have conversations with the spirit of her dead father. She becomes determined to reveal the identity of the mysterious killer. But the more Sakura thinks about it, she is inclined to suspect her older sister's boyfriend as the murderer!