I'm currently creating a new plot for a book, but it needs a bit more expansion, here's the gist of the idea: John Defoe (son of a widowed mother) has to get the money to pay off his fathers massive debt, and pay off his family farm's rent. But when he gets into town, he is told by the mayor, that if he can kill the 5 deadliest outlaws and bring back their weapons as proof, then the debts will be forgotten and the bounty money shall be given to John. But as John finds and defeats each Outlaw, he slowly uncovers the mystery behind his father's death, a secret about his family farm and a conspiracy dating as far back as the creation of the Wild West. The plot takes place in the Wild West era, I've got a few big plot points andthe main characters (John, The Mayor, 5 outlaws etc.) almost fully sorted, but how do I flesh out he story, what can I put in it to improve it and make it more original?