Quadrille is a card game where partners can change during the game. John Brewer returns to the Great War to create his best novel yet of romance broken by the viciousness of WWI. Will and Tom have had each other's backs from lower class London street brawls as teenagers to the Somme trenches of WWI. They lost their hearts to the same suffragette who prefers Tom. Will struggles with friendship or love. At a tram stop, his random act of chivalry opens a new friendship that could change his life. The sickle of war creates an opportunity for a change of partners.