Detective Comics Vol. 1 (1937-2011; 2016-) #460

Plot

Captain Stingaree, a sword-wielding villain, becomes convinced Batman is really portrayed collectively by the Courtney triplets, a team of private investigators, and captures one Batman, who proves to be Michael Courtney. "The Cold-Fire Caper!": Tim Trench is assigned by a beautiful woman to find a stolen ruby that turns out not to be stolen after all. (mycomicshop.com)