Faith will not save him.
Saker appears to be a simple priest, but in truth he's a spy for the head of his faith. Wounded in the line of duty by a Lascar sailor's blade, the weapon seems to follow him home. Unable to discard it, nor the sense of responsibility it brings, Saker can only follow its lead.
The dagger puts Saker on a journey to distant shores, on a path that will reveal terrible secrets about the empire, about the people he serves, and destroy the life he knows. The Lascar's dagger demands a price, and that price will be paid in blood.