The Penitent Assassin

Thirty years ago, when Mallor was a child, he was the sole survivor of genocide. Five years ago, while pursuing his revenge he was ambushed and killed. His goddess offered him a chance to return on the condition he became her assassin. Mallor agreed.
Now, he is back, in the dank city where it all began hunting down a list of old foes, but thirty-six hours before his revenge would be complete, he learns a couple of things; he has a daughter, she's been kidnapped by a sadistic magic abuser and the price for her release would not only ruin all of his plans but also kill his goddess.
Mallor is nobody's hero, but could he sacrifice his daughter to save his goddess, or will he forsake his faith and his need for revenge, risk going to hell and rescue her instead?