The king returns, with only one purpose: to protect the one person who matters most to him. Male lead (Lin Feng): Once the invincible God of War “Yan Luo” in the mercenary and underground worlds, he retired after growing tired of killing or being betrayed and gravely wounded. In truth, his medical skills are godlike and his fighting ability unfathomable. He is cold on the outside but deeply devoted, and incredibly gentle with his daughter.
· Female lead (Su Wan): The male lead's former lover or wife from years ago. Gentle on the outside but strong-willed within, she gave birth to and raised their daughter alone. Life has been hard, and she may be seriously ill or facing a major crisis.
· Adorable child (Lin Xiaoxiao): Around four or five years old, smart, quick-witted, and full of mischief. She is the male lead's little treasure and his one vulnerability. She may have inherited some of her father's talents, such as an instinct for medicine or exceptional bravery.
· Villains: A local wealthy family trying to force the female lead into marriage, old enemies who have discovered the male lead's whereabouts, or the person who betrayed him back then.
