Lincoln still has serious debts. He owes Bingles a helluva lot of gold. More important and more pressing, Lincoln has to start making payment on his contract with Callista, or she will stop protecting Lincoln's son, Sam, in the purgatory known as “the Shelf.”
To get the treasure he needs to give to Callista, Lincoln needs to get back on the bounty-hunting tip, which means a trip to Wyoming and track down a really, really big lizard.
