After a Death in the Family, Batman almost gave up. Robin did not. Somehow Jason Todd dug his way back up from the dead to become the brutal vigilante, the Red Hood.
Seeing a golden opportunity when she finds the reborn Jason wandering the streets catatonic, Talia al Ghul restores his vitality in a Lazarus Pit, then hones his vengeful wrath into a righteous anger with anyone who harms the innocent.
Target: the Joker. For countless reasons, including killing Jason to begin with, he must die. Also in their sights: Batman. For his refusal to put the mad clown down permanently, countless murders stain the Dark Knight’s hands. Batman must die as well.
From Judd Winick (Batman: Under the Red Hood) comes the origin of Jason Todd’s return!

 Collects Red Hood: The Lost Days #1-6.