Bavaria, 1886King Ludwig II, infamous for his eccentric behaviour, is declared insane byhis government and removed from his throne. A day later, Ludwig's corpsewashes up in the shallows of Lake Starnberg. Rumours about the cause of thetragedy abound, but few people really know why Ludwig was killed. Or whatsecret was silenced by his death.Germany, present dayHidden among the crates in a newly discovered Nazi bunker are documentsstamped with a black swan, the insignia of the murdered king. As a favourto a friend, Jonathon Payne and David Jones fly to Bavaria to protect thedocuments, but soon face a life-or-death battle against an unknown enemy.From the depths of the Black Forest to the water canals underneath Ludwig'scastles, the duo must solve the mystery behind the king's death or sharehis tragic fate.