Beijing, which has long become an international metropolis, is home to Zhang Xiaowen (played by Chen Yihan), a quirky white-collar worker. She longs for a romantic and beautiful relationship, but her destined other half never comes. One day, she accidentally falls into the water. When Xiaowen surfaced, she found herself in ancient costumes, with a masked man chanting strange spells next to her. Later, she was chased by a mysterious person, but was rescued by a handsome man. Xiaowen originally thought it was just a bizarre dream, but when she woke up, she found that she had really traveled to the Qing Dynasty and became the brother of Maertai Ruoxi. During this period, she met the fourth prince Yinzhen (played by Yang Youning), who had not yet become Emperor Yongzheng, and the fourteenth prince Yinzhen (played by Dou Xiao), who was involved in the dispute over the crown prince in the future. With romantic love and the turmoil in the palace, Xiaowen is destined to experience a legend... This film is adapted from Tong Hua's novel "Startling by Each Step".