Traveling through time in a single day, she became an unloved fat princess consort in the prince's manor. Facing a cold-faced husband and an unfamiliar life, she does not complain or rot away. Starting from self-disciplined weight loss, reading, doing business, and raising her child, she steps by step regains her confidence. Days become more and more prosperous, the child is sensible and cute, and the husband and wife gradually develop a tacit understanding in getting along. It turns out that the best life is not waiting for someone to pamper you, but turning yourself into a ray of light.