Two young Englishmen (Chandos + Hanbury from the previous books Blind Corner and Perishable Goods) go to Austria to practice their German. On a stormy night their car stops at a crossroads and is mistaken for the vehicle being used to kidnap the prince. After much adventuring the correct prince gets the throne and Chandos gets the girl. Lots of bad baddies, noble goodies, vintage Rolls Royces etc. Great fun.