Crossing the Rubicon - Nature Knights, #1

A girl with a mission. A boy with a secret. A clock that's running out. A plague known as the Blue Death is sweeping throughout Avalon. Clancy Donovan's sister has died, and now her brother is sick too. In a desperate attempt to save him, Clancy risks everything - including her own life - and defies her Queen to enter enemy territory in search of a cure. There she meets Eric Archer whose brother is also sick.
Convinced Clancy knows more about the disease than she's letting on, Eric follows her back to Avalon bringing his cousin (John Shanley) and his best friend (Audrey Eden) with him. The four set out togther on a quest to find a cure for the Blue Death, but they have only three days.  In this race against time, they dare not let the clock run out.