Chu Yunge came to the capital with her five-year-old son Nanxing, only wanting to open a medical clinic and live a peaceful life. A street rescue unexpectedly reunited her with the cold-faced Prince Regent Xiao Jue. The more she wanted to keep a low profile, the more her hidden skills could not be concealed; the more he wanted to investigate past events, the more he was moved by this mother and son. The clever and cute child frequently made moves, and the two adults went from mutual distrust to joining hands to face the storms. When clues of past events and life experience quietly emerged, what connection did the secret she guarded actually have with him?