Go after Quinn

Batgirl knew Harley was the mastermind behind what ever was going on. So when she saw Quinn jump on a motorcycle, she knew she had to go after her.

Batgirl threw a smoke bomb at the group of men, as they where distracted. Batgirl grabbed her grapple gun, used it to get back on the roof of the warehouse. She spotted Harley's motorcycle, as it sped off.

Batgirl jumped from rooftop to rooftop, a few times she had to use her grapple gun to keep up with the motorcycle. After a long chase Harley went into an alley. Batgirl saw her get off the bike and went into a building.

Batgirl landed in the alley, she was getting tired but refuse to let Harley go. She chased after Harley into the building, Batgirl carefully walked through the hallways of the building.