Medical postgraduate Ethan Hale time travels, becoming an unfavored concubine-born son. He takes his brother's place as marriage-bound son-in-law of a female war god. Mocked and treated with hostility, Ethan uses modern medical knowledge and logical thinking. He saves people with medical skills, resolves disputes with wisdom, and advances amid power struggles. The despised son-in-law breaks free, defeats enemies, holds power, ascends the throne, and creates a prosperous empire.
