Detective Comics Vol. 1 (1937-2011; 2016-) #1099

Plot

Stranded far from home, Batman, Harvey Bullock, and the Penguin must form a shaky alliance to bring down the age-old immortality cult known only as Elixir. But as tensions rise among this unlikely trio, it becomes increasingly doubtful that this alliance is possible...or that the Dark Knight will ever make it back to Gotham City.