Picking up where the last issue left off, Luke finds himself in the water with a giant prehistoric fish that's been living under Gotham, and well, it wants to eat him. No problem with that, fish swim and eat, but Luke has no interest in being dinner, and despite knowing he should probably feel bad, his determination to find his sister leaves him not caring that he just blasted the thing in the face with the jets on his feet.
Luke emerges from the water and heads deeper into the Gotham Underground where he finds what looks to be a forced labor camp, run by these guys with speakers for faces. One of the workers rises up and starts a riot, which gets Luke involved. When everyone scatters, Luke finds the guy who starts the riot and gets him to sort of guide him through the underground. Meanwhile, Lucius is with Batman yelling about him not doing enough to find his daughter, and Menace is telling Luke's sister that it's all her brother's fault, blah blah.
Luke's guide through the Gotham Underground brings him to shop for him to get new clothes that'll not make him standout. As they walk through the city, Luke is impressed with how advanced the place is, despite it being a total dump. After mentioning having met the Anubis fellow earlier, Luke is lead to where his guide seeks asylum from the people who forced him into slavery... The Anubis clan, presenting Luke to them as someone who did them wrong.
Doesn't take a genius to realize a giant fight breaks out, and the numbers alone force Luke to retreat into the rafters where he drops a gas grenade on them. Luke takes the leader "Mother of Anubis" with intent on getting info out of her, but as the issue ends, he runs into his old pal Menace.