Modern Agent Becomes Feudal Princess

Agent Song Yue accidentally travels to another world and becomes the legitimate daughter of a general's mansion who has been suffering from mental illness for three years! She possesses high martial arts skills, excellent medical knowledge, and can understand bird language! When her evil step-sister, wearing the original owner's identity, holds a grand wedding, Song Yue returns with a sword amidst flames. She publicly tears apart her stepmother's hypocritical face and retrieves her identity from the evil step-sister's hands. She vows to step on everyone who has bullied the original owner!