Shan Cai, whose parents are far from wealthy, attends Ying De University, the private school established exclusively for rich students. Besides being looked down by rich classmates, she has angered the leader of F4, Dao Ming Si.

A classmate gathering, a late night out, and a trending article brings married woman Qiao Wei, chief editor Su Yao, television producer Nicole and hotel chef An Xin together. The four women with different personalities suddenly find their fates deeply tied together, and together they form an "alliance". They take revenge against violent husbands and cheating boyfriends, using methods like threatening, intimidating, scheming and even death.