Sam discovers that demons don’t work on Halloween. Unfortunately, a depressed Devil decides to make Sam’s assignment even harder to cheer himself up. Sam and Sock capture one soul, Leon, an escapee who killed someone over a hundred years ago, but before Sam can return him Leon tries to convince them that he's changed. The Devil then sends Sam to recapture a second soul, a serial killer who plans on starting a new murder spree.

It's a demons world, as the gang encounters a demon support group with members who are trying to change their bad ways. However, not every demon is in for a change, as Sam and his friends must take down one who poses as a lawyer to unleash leeches on his victims.

Sam, Ben and Sock encounter a few surprises on their return from a road trip; Andi refuses to speak to Sam; the Devil has a new assignment.

Sam and Alan make a deal; Morgan and Sam are pitted against each other; Nina wants Ben to introduce her to his family.