The handsome Spencer Dumarck, Duke of Moreland, is called the Midnight Duke in society. Every time the clock in the ballroom strikes midnight, he invites the lady to a waltz round - and this dance is beautiful, like the night of love. However, Spencer doesn't pay much attention to any of the society beauties... until one day everything changes. The determined and beautiful Amelia d'Orsi invites him to dance herself - and wins Dumarck's proud heart... The girl, who only wanted to talk to him about the debts of her dissolute brother, unexpectedly finds herself drawn into a risky, deadly game of insane passion. And she doesn’t even know who she gave her heart to - perhaps Spencer is a murderer...