If death isn't the last stop on the train, what happens next? Are the not-quite-dead content with their lot? Or do they wish that they could settle old scores and right old wrongs, assuming they could make their way out of the underworld?

When a construction project in the St. Paul neighborhood of Frogtown opens a portal from the below to topside, neighbors get a chance to find out. The undead are bent on revenge.

Standing in their way are Fatman and his firecracker wife, Doris. After the undead settle a number of grudges (often employing their signature move, the "twist off," which involves a separation of head from neck), Fatman and Doris team up with their old friend Duke Black, a high-priced but morally challenged lawyer. Together the three crusaders launch an investigation and campaign that results in Doris's abduction and a harrowing rescue mission into the stinking bowels of the underworld.