The young girl Dudu (played by Wu Zhenlin) escaped from the strict control of her father (played by Zhang Guangbei) to attend a cosplay party. Before she went on stage, she was robbed by a masked man Dayong (played by Ai Junlong). Dudu fainted, and Dayong couldn't get rid of it, so he called his friend Akai (played by Zhang Mo) for help. The two took Dudu to Akai's photography studio. Unexpectedly, after Dudu woke up, she pestered him and used both soft and hard tactics. A kidnapping became a disaster for Dayong and Akai. The two sent Dudu away with kind words. The extremely depressed Dayong and Akai had not recovered yet. Dayong's creditor Dantou (played by Jiang Wu) came to the door. After some jokes, Dantou kidnapped Dayong and asked Akai to raise money to redeem him. Dudu returned to the photography studio to find her mobile phone and learned that Dayong was kidnapped by Dantou because he owed debts for playing online games and gambling. She volunteered to rescue Dayong. In the black Internet cafe of Dantou, a group of cosplay players competed with Dudu in online games and lost one after another. Dudu exposed Dantou's cheating methods, interpreted the secret of winning online games, and advised everyone not to indulge in online games. Dudu was admired by everyone. Dantou hated Dudu and accidentally discovered Dudu's identity, waiting for an opportunity to retaliate. During their relationship, Akai discovered the secret between Dudu and Dudu's father. Akai and Dayong were moved. Akai and Dayong agreed to help Dudu attend the parent-teacher meeting as a thank you. Akai, who pretended to be Dudu's father, made an impassioned speech at the parent-teacher meeting and was admired. Everyone held a party to celebrate the success of the parent-teacher meeting. Dayong suddenly received a call from Dudu's father, asking Dayong to let Dudu go. It turned out that Dudu had secretly sent a message for help using Dayong's mobile phone at the beginning, and Dudu's father regarded Dayong as a kidnapper. Akai blamed Dayong, and Dayong cried and panicked. After discussing, the two decided to accompany Dudu home to explain clearly to Dudu's father in person to clear the guilt of the kidnapper. After persuading Dudu, the two were glad that they could still save the situation. Unexpectedly, Dudu disappeared. In panic, the two came to Dudu. They could not explain clearly and were struggling. Bullet called to ask Dudu's father to redeem him. Dudu's father recalled a historical grudge. It turned out that Dudu's father handled a case ten years ago. The defendant jumped off the building and died after losing the case. This person was Bullet's father. Dudu's father apologized to the family out of humanity. Bullet had been resentful of Dudu's father for a long time. At the kidnapping scene, Bullet was furious and threatened Dudu's father to pay off the grudge owed ten years ago. Dudu's father only asked Bullet to let Dudu go and resolutely jumped off the tall building... Dudu was in great pain. Akai told Dudu the secret between her and her father. Bullet was easily arrested by the police because of this secret. An unsuccessful kidnapping incident triggered three serial kidnappings, involved a feud, exposed a family secret, and made everyone feel the preciousness of family affection and friendship.