Batman: Mystery of the Batwoman

Batman Mystery of the Batwoman is a 2003 directtovideo animated film based on the animated series The New Batman Adventures, serving as a standalone sequel to both Batman Mask of the Phantasm and Batman amp Mr. Freeze SubZero. It was released in the U.S. in October 2003 and was produced by Warner Bros. Animation.

Batwomans main focus is on illegal activity by the Penguin, Thorne, and Duquesne. Despite taking the symbol of the Bat as a sign of justice, Batwoman sullies the Bat prefix by taking out criminals with ruthless and dangerous techniques. She seems uninterested in sparing the lives of her adversaries.Batman, with Robin, sets out to stop the Batwoman from making mistakes as she tries to take out the villains, and as he encounters numerous twists, setbacks, and apparent false leads in determining her true identity. The newest gadget on display is a wind glider used by Batwoman that utilizes some of the most advanced technology ever seen in Gotham City. Bruce Wayne, Batmans alter ego, also becomes involved with a new lady in his life Kathy Duquesne, the crime bosss daughter. ........

Source: Wikipedia