The struggling designer Lin Wanwan mistakes a person at the entrance of the civil affairs bureau, and by a twist of fate has a flash marriage with Lu Cili. Lu Cili marries her only to use the marriage certificate to exchange for the group's official seal, but steps forward to protect her time and again when she is forced into marriage by her stepmother and framed by his second uncle Lu Yun. The two strangers turn a fake act into reality; she refuses to be a dodder flower, passing the exam into Tingyao with her strength; he transforms into a wife-protecting maniac, forcing the scumbag father to cough up five million in child support and uprooting Lu Yun's faction. When childhood sweetheart Fu Chuwei sets a trap to instigate discord, Lin Wanwan reveals her identity to launch a strong counterattack. This marriage, starting from a mistake, became each other's only redemption.