Xiao Xiao, daughter of the Grand General Who Guards the Nation, entered the Eastern Palace at the age of seven and resolved to become Crown Prince Chu Lin's closest confidante. However, because of her peculiar way of thinking and her habit of turning good intentions into disasters, she ended up becoming the Crown Prince's greatest headache instead. Who could have guessed that the two would be forced into a marriage alliance? After getting to know Xiao Xiao's true nature, Chu Lin gradually develops feelings for her. Yet political undercurrents swirl through the imperial court. To protect Xiao Xiao, Chu Lin sends her away. She eventually sheds her naivety and uses her courage and strategic brilliance to help Chu Lin quell a rebellion and ascend the throne. The childhood sweethearts who once bickered like sworn enemies ultimately become emperor and empress, ruling the realm together.