Animated feature co-written by Bruce W. Timm and James Krieg and featuring the voice talents of Kevin Conroy and Melissa Rauch.
The film follows Batman (Conroy) and Nightwing (Loren Lester) as they form an uneasy partnership with Harley Quinn (Rauch) to stop Poison Ivy (Paget Brewster) and the Floronic Man (Kevin Michael Richardson) from turning the people of Gotham City into plants.
The evil duo have hatched a plan to save the planet but in order to do so they must wipe out most of humanity in the process.
To stop them Batman and Nightwing enlist the help of Harley Quinn, who has recently been released from Arkham Asylum and is working as a waitress, to help them track down her old friend Ivy.
Can Harley really be trusted to help the dynamic duo succeed?