Batman and Nightwing are on high alert when they discover that Poison Ivy and Floronic Man have joined forces. With the world facing an ecological threat of catastrophic proportions, the duo realizes that they must find Harley Quinn, hoping she will have the inside scoop on Ivy’s current whereabouts and plans. The urgency of finding Ivy is amplified by the revelation that she and Floronic Man are planning to recreate a formula that could turn all living creatures into plant hybrids, thereby threatening the balance of all life on Earth.

Reluctantly teaming up with Harley, who has abandoned her villainous lifestyle in an attempt to start anew, Batman and Nightwing find themselves in an uneasy alliance. The trio embarks on a quest to track down Ivy and stop her impending plan. Along the way, they must navigate the unreliable loyalties of Harley Quinn, whose unpredictable behavior adds an additional layer of complexity to their mission. As they close in on their targets, the three must overcome their differences and utilize their strengths in a united effort to thwart the ecological disaster looming on the horizon.