Yeh Phool Chaman Mein Kaisa Khila

A man wakes up next to his dead wife without any recollection of what happened the night before. He faintly remembers having a nightmare about attacking his wife but was certain he did not commit the crime. Did he or did he not? Or was he made to? The only clue seems to be the song 'Yeh Phool Chaman Main Kaise Khila'.