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.

On a stormy night, a mysterious drowning case implicates Qiao Wei and her psychiatrist, Ou Keni. While visiting her fiancé Meng Wenzhe’s home, Ou Keni discovers old photos of Qiao Wei, raising suspicions about his adopted brother. As their wedding approaches, dark secrets emerge, revealing Meng Wenzhe's manipulative nature. With Ou Keni in grave danger and her assistant Shanshan—who knows too much—falling to her death, a web of carefully orchestrated accidents, disappearances, and deaths unfolds, leaving everyone questioning the truth.