Song Wanqing and Luo Hao were once a perfect couple. However, everything changes when Luo Hao's sister, Luo Xue, moves in with them. Wanqing begins to notice the growing intimacy between the siblings, which feels more like a romantic relationship than family. To uncover the truth, Wanqing installs surveillance cameras in the house, only to discover the shocking truth—she's been deceived. Luo Hao married her for the sole purpose of using her as a surrogate, planning to force her out and pave the way for Luo Xue. Armed with the truth, Wanqing embarks on a path of revenge, step by step.