the man in 401

A man moves into an old apartment, and his neighbor delivers a chilling warning: "If you turn on the light, I'll die." Every time the switch flips, a scream tears through the wall. A month later, the neighbor is found hanged, and a scheduled text accuses the newcomer of murder. Fighting to clear his name, he uncovers twins behind the death — but the darkest truth is his own: he has an identical brother, and the man everyone suspects merely began what he finished. The detective knows. He just can