To revenge himself on five ex-fraternity brothers who traumatized him, Calvin Stymes causes the quintet to be immersed in the waters of Koehaha, which do not drown their victims but wash away their consciences. JSA split up to capture the men. Batman went to the city of Zenith where he fought the Grim Marauder, who stole a valuable black pearl necklace from a socialite party. Batman followed him back to his hq, where the Marauder trapped Batman and put a rawhide noose around his neck. Batman was freed by Calvin Stymes, and he quickly dispatched the Marauder.