More than you can say

the long version

"Richard Gaunt cannot resist the offer to double his money if he meets for lunch at the Randolph Hotel in Oxford the next day. All he has to do is walk from London to Oxford in under twelve hours. But along the way he is taken hostage by a stranger, Mr Khan, who makes him a proposal, that could transform his life. He has nothing to lose as his wife and friends won't speak to him, and he has lost every job he has had. Therefore he accepts the request, never imagining the places it will take him..." --Publisher description.