Doyle Mac Clerich - soldier and reluctant immortal - has always vowed never to return home. But when his search for the final star leads him to Ireland, it becomes clear that fate has other plans.

Solitary by inclination, Doyle is also fighting his growing attraction to archaeologist Riley. His warrior spirit is drawn to the wild - and there's no one more familiar with the wild than her. As the six guardians face their final challenge, Riley and Doyle are prepared to risk their lives in battle. But without love to sustain them, the quest is doomed to failure ...