A man in his thirties lost his wife in an accident and now lives alone with his young son. One night, working late from home, he notices an icon on his desktop that should not be there: sin.exe. He tries to delete it. It does not go away. New folders start appearing one after another, filling his screen. Inside them: photographs and text files that look like diary entries from someone he does not recognize. The disturbing phenomena continue and escalate. There is no obvious exit from the situation.