My Father, The Hidden Sword!

Once a legendary martial arts master, Alistair Caldwell now lives as the most despised servant in Rivertown. To honor his late wife’s vow, he has buried his sword and faded into obscurity. But when his son is humiliated and his sect betrayed, he is forced to wield the sword once more, igniting a storm of vengeance and unveiling an 18-year-old murder mystery.