Batman: Under the Red Hood is based on the popular Judd Winick story of the same name, which ran in the Batman comic series from 2004 to 2005.
Summary: This dark story features Batman at odds with the Red Hood, a mysterious new vigilante leaving a trail of dead bodies in his wake throughout Gotham. Winick is also listed as writer for the animated adaptation.
The Batman: Under the Red Hood direct-to-video animated feature is directed by Superman Doomsday co-director Brandon Vietti, and features the voice talents of Bruce Greenwood (Star Trek) as Batman, Jensen Ackles (Supernatural) as Red Hood, Neil Patrick Harris (How I Met Your Mother) as Nightwing, John DiMaggio (Batman: The Brave and The Bold) as the Joker and Jason Isaacs (Harry Potter film franchise) as Ra's Al Ghul. Bruce Timm is the executive producer.