The tyrannical emperor who shows up at her door every day to pick fights and hurl insults turns out to be a fellow hometown native who traveled through time to ancient times alongside Lin Wan! After spending five years as the empress of the cold palace, she discovers that Emperor Xiao Che, a graduate student in history who arrived just a month ago, is also from the modern world. Recognizing each other through their shared Tangshan dialect and internet memes, they transform from bitter enemies into the perfect allies. Together, they take on the Empress Dowager, push through new reforms, build a new city, and pacify the northern tribes. Amid the treacherous imperial palace, they gradually fall for each other and create an era of peace and prosperity.