On a cold Autumn day in a damp cellar, Petrichora first experiences what it's like to see and hear thoughts. After a failed plot to steal sweets, Hiraeth is attacked by things that nobody can see. Khleo, a prince already bound by his duties to the throne, feels his grip on his royal facade crumble as he struggles to cope with his parents dying from a strange new disease... What starts as a collection of confusing encounters ends up as a far more complicated and dangerous hunt for the truth and a fight to rid the world of suffering. Fortunately, the three children don't have to do it all alone, as they are helped by a kind woman, a scientist and one very special flower... But the truth is never easy to find, and there are always people out there who will do everything in their power to stop you, By Any Means Necessary...