Two kings, Three young soldiers. One battle to end all battles.

Eager to prove his courage and defend his family honour, young Irish noble Gerald O'Connor rides his warhorse Troy north in King James's cavalry.

Brothers Robert and Daniel Sherrard march south from the once-besieged city of Derry with King William's army.

The chosen field of battle – the Boyne – lies waiting, where victory will decide who rules the lands of England, and of Ireland.

And the fighting will decide who survives the deadly game of war.