Twenty years after surviving a bloody conflict in Gotham City, Diana of Themyscira has settled down and raised a family. But a threat looms on the horizon - a sinister foe known only as The Grey Paladin. Now old heroes must come out of retirement, forge new alliances, and unearth buried ghosts that threaten to change things forever.

After a bitter departure from the Justice League, Bruce sees a day when Gotham no longer needs Batman. The Dark Knight must fight off the appearance of a new threat, the Joker - who threatens to undermine all progress- and juggle the emotional problems that arise when a woman from an abandoned relationship reappears in his life.