However, just as he and his crew are about to touch down in Acre, they are drawn into an intense battle at sea, where they are faced with the dreaded Byzantine weapon: Greek Fire.

Barely escaping with his life, Will gains the trust of Richard Lionheart, moving into his service. But as the siege of Acre continues, and Richard's campaign grows ever more brutal and barbaric, Will begins to wonder just how safe his new position is. And when the King sends him on a seemingly doomed mission, Will must ask himself: who exactly is he fighting for?