On the wedding day, two wedding horses that suddenly took a liking to each other knocked over the floral arch, and the gentle adopted daughter Han Zhien and the short-tempered heiress Han Shena were picked up and taken into each other's bridal chambers. One was forced to learn to go crazy like her sister, and the other casually trained her mama's boy brother-in-law into an errand boy; though the people were switched back, their hearts had quietly taken the wrong path. Half a year later, both marriages ended up broken apart—the next time someone stood by their sides, would it be their original husbands, or the true love delivered by a blunder?