Every time Xu Nan finishes a meal at her husband's family home, she forgets things. Gradually sensing something unusual, she discovers that her husband Zhao Wei knows but remains silent. Seeking the truth, Xu Nan takes a risk and hides a miniature camera outside the Zhao family study, finally capturing a shocking secret. As she continuously ventures into the tiger's lair, gathering evidence time and again, and joining forces with past victims to fight back, the truth under the lens gradually reveals itself.