After defeating some of Harley’s men Batman starts to untie one of the Cops, however Batman gets shot by Harley. The scene ends and goes back to Robin, who is still holding the utility belt.
Continuing his search, Robin encounters more of Harley's men and defeating them Robin looks up to discover a giant Joker Statue, made of scrap metal holding a bubble with Batman meditating inside.
After examining the device, Robin learns that the bubble is quickly running out of oxygen and learns that Harley Quinn has the only override to release the ball. Robin goes searching for Harley and finds Harley and several more of her thugs in a dry dock not far away, along with several cops who were taken hostage.
After dispatching the thugs and defeating Harley and also saving the cops, Robin returns to Batman's prison and is attacked by several waves of thugs, including one Titan thug. After beating all of the thugs into submission, even the Titan henchmen, Robin frees Batman and returns his belt.
Harley then reveals on the speakers that she has planted bombs in the building. Batman orders Robin to get the cops to safety and he will deal with the bombs. After successfully defusing the bombs, Batman encounters Harley and several Guardians of Wonder City painted to look like Joker.
After destroying the robots, Harley reveals the Giant Joker Scrap Statue was housing a large bomb and was going to go off any second. After escaping with Harley, Batman can't find Robin and frantically asks Gordon, who was outside Harley's hideout; If he has seen Robin, to which Gordon thought he was with Batman.
Fearing Robin was killed in the blast, Batman lets his guard down and begins to mourn. Harley pulls a knife and prepares to kill Batman, however she is stopped by Robin, who not only survived the blast but managed to rescue all of the officers. Realizing Robin is safe (and secretly hiding his relief that his adopted son is okay), Batman tells Robin he is done here and leaves the area. Gordon asks Robin if Batman is okay, with Robin telling Gordon that he will be fine, but in reality knows that Batman is not fine as a worried expression appears on his face.