Gotham City simmers in the aftermath of the Joker's war with the Justice League. The Rusthouse lies in tatters, and the Joker, presumed dead, has vanished. However, a new threat emerges from the fetid swamps outside the city - Solomon Grundy, a monstrous undead behemoth. Driven by an insatiable hunger, Grundy stalks the city with a single-minded purpose: to find and destroy the Joker.
Confused and weakened, the Joker surfaces from hiding. He grapples with the consequences of his actions and a nagging fear - Grundy's relentless pursuit might be a twisted form of immortality he never desired.
Desperate for answers, the Joker reconnects with his former cohorts - Sofia Gigante, the cunning criminal mastermind, and a reformed Scarecrow, now seeking redemption. Together, they delve into the dark secrets of Solomon Grundy's origins, uncovering a horrifying truth - Grundy's existence is linked to an ancient evil that threatens to consume Gotham.
As the body count rises and Grundy closes in, the Joker must make a choice: succumb to his fear and be consumed, or embrace the chaos once more and confront the monster he may have inadvertently created.
