Alethea was princess of Exzonia, and Milo was King Cassian of Lacuna's Captain of the Royal Guard. And they lived in a world where each had two birthmarks, one corresponding to their soulmate, the other to their worst enemy. Milo and Alethea shared identical birthmarks, making them both sworn enemies AND unfortunate soulmates. So when Milo had been ordered by his king to kill Alethea, it proved impossible, as soulmates couldn't hurt each other no matter how hard they tried. Now Milo needed a new plan, but before he could come up with one, a foreign enemy attacked. Can Milo put aside his mission to get rid of Lathy just a little while longer? Can they work together to defeat a common enemy while still keeping their distance? Or will Milo let down his guard and let his heart get in the way?