Vera Shaw, a Master Healer, travels through time and becomes the weak daughter of the Shaw Estate. She awakens the 'Mischief System' to accumulate 'Mischief Points.' She turns the tables on an enemy prince, helping the Shaw family achieve victory, then is given an Imperial Marriage Decree to marry Prince Jasper, who is disabled and rumored to be impotent. Vera Shaw accepts the marriage, thinking it will be easier to accumulate points in the Capital.