Song Weilan catches her husband, Gu Zhenting, shopping with his mistress, and her mother-in-law, Liu Huifang, calmly steps forward. Publicly exposing her husband for embezzling family savings to support his mistress, Liu Huifang presents ironclad proof of chat logs and money transfers. Facing her husband's denials and the mistress's sophistry, Liu Huifang presses step by step, finally producing the divorce agreement to strongly defend her daughter-in-law's rights and help her break free from an unhappy marriage.