The Tale is the plot of a confidence game. It defines the ways in which TheMark will [[AFoolAndHisNewMoneyAreSoonParted be duped]]. A con-man crew usually includes a team member called the Roper, whose job is to ingratiate himself with the mark and tell them "the tale" of how the GetRichQuickScheme supposedly works, thus "roping him in". The terms Long Con and ShortCon are related to the complexity of the tale. The slang term for these is a "gag."
See also TheCon, ConMan.