An aging Krav Maga instructor reluctantly teams up with his estranged bounty hunter daughter to hunt down the man who raped and killed his wife.

"After his wife is brutally raped an murdered, an aging martial arts instructor seeks revenge with the help of the daughter he abandoned years ago, who is now a bounty hunter."

Krav? Maga? It's karate but you have to identify for the reader what it is.? What's the risk to the hero? Good start.