About the Batman #403 [Second Printing]

The deranged Tommy Carma is now in Arkham Asylum and still believes he is Batman. He hallucinates that two orderlies are the Joker and Two-Face, then kills them and escapes through a window. Eventually he stumbles onto the estate of Wayne Manor, where he slips into the cave system while running from the police. Tommy Carma finds the Batcave, which he believes is his own headquarters. He steals a fresh Batsuit and the Batmobile, then leaves to go on patrol.