Gu Shiyu is fierce and decisive in killing, yet free-spirited and casual, Gu Zechuan is gentle, talented and well-behaved. Both of them are the favorites of the Gu family's parents, and Mu Yao is a rare eldest daughter of the Mu family who is outstanding in literary talent and beautiful as a flower. The Gu family and the Mu family are family friends, and Gu Shiyu, Gu Zechuan and Mu Yao are also childhood sweethearts.
