In the aftermath of a devastating plague, a young lord is determined to discover the truth behind a mysterious attempt to assassinate the young queen.

The past never forgets . . .

Three years ago, Lord Cassia disappeared in the midst of war, on a mission entrusted to him by the king. Since then, a devastating plague has swept the land, leaving countless dead and the kingdom forever altered.

Having survived a rotting prison cell and a merciless illness, Cas, now eighteen, wants only to return to his home in the mountains and forget past horrors. But home is not what he remembers. His castle has become a refuge for the royal court. And they have brought their enemies with them.

When an assassin targets those closest to the queen, Cas is drawn into a search for a killer... one that leads him to form an unexpected bond with a brilliant young historian named Lena. Cas and Lena soon realize that who is behind the attacks is far less important than why. They must look to the past, following the trail of a terrible secret - one that could threaten the kingdom's newfound peace and plunge it back into war.