Chu Feiyang, disguised as a man, accidentally ties up the heir Mu Yunshen, leaves a copper coin, and leaves dashingly. The two reunite in the military camp, sparking many hilarious farces due to rumors from others. Chu Feiyang repeatedly tries to escape, but develops mutual feelings while fighting side by side in the war of the Dongyue Kingdom. Mu Yunshen is afflicted with a rare poison, and the physician Gu Nanzhi holds the antidote, using the position of the heir's consort as leverage. Amidst chaotic bickering, divine assists and obstructions from parents, the heroine learns that her days are numbered, struggling and pulling between life and death, antidote, and love and hate.