Transmigrating as a Military Strategist and Imperial Consort

She was a renowned detective, respected by all for her sharp mind. Then she transmigrated and became a disgraced concubine-born daughter, cast out of her family. She accidentally trespassed into a trial ground, was captured, and nearly silenced for good. She ended up as some sort of maid, serving her master hand and foot and constantly dodging one disaster after another. But one day, the cold-faced young lord revealed himself to be a prince, and she found herself setting her sights on the realm alongside him. And her reward once they succeeded? Sorry, this young lady wants to be his one and only!