After Batman faces down an army of winged horrors in a no-holds barred, bone-crunching superbrawl among the treasures of London's Pop Art Museum, Batman receives the greatest shock of his life when he discovers that he has a son. Sparks fly when the new addition to the Bat-family is introduced to Batman's adopted son, Robin, the Boy Wonder. Which one will be chosen to carry on the legacy as Gotham's protector?