In this dark and psychologically intense animated feature, the fragile line between sanity and madness is violently tested in a brutal game orchestrated by Batman's greatest nemesis. Voiced by the iconic Kevin Conroy, the Dark Knight finds himself confronting a Joker, chillingly portrayed by Mark Hamill, who has escaped Arkham Asylum with a singular, horrifying goal. The Clown Prince of Crime devises a cruel experiment to prove that one bad day is all it takes to drive even the most upstanding person as insane as he is, targeting Police Commissioner Gordon (Ray Wise) and his daughter Barbara, aka Batgirl (Tara Strong). As Batman races against time to stop the Joker's nihilistic rampage, the film delves into the twisted origins of the villain, exploring the tragic circumstances that created a monster. Directed by Sam Liu from the seminal graphic novel by Alan Moore, this R-rated thriller masterfully blends grim action with a haunting character study, pushing its heroes to their absolute limits in a story that questions the very nature of justice and chaos.