When Dusky gets a call for help from his old buddy Capt. Wes O'Davis, he knows there's big trouble brewing. O'Davis has been set up to take the fall on a murder rap by a gang of kidnappers whose latest victim is the son of Sir Conan James and Lady James, British aristocracy with powerful connections.   The ransom note gave them three days to pay up, or their boy dies.   But now that Dusky MacMorgan is involved, that gives the kidnappers only three days to live…