Episode Summary
Su Chengcheng's filter malfunctions cause her to transform into various people and even become invisible. Tang Qi faces the pressure of meeting Su Chengcheng's parents, while also dealing with his own mother's visit. After a series of comical shapeshifting incidents and a dinner with Su Chengcheng's intimidating father, Su Chengcheng becomes invisible, leading Tang Qi to seek a solution from the bracelet's original owner.

Spoiler Alert
The evening starts with Gu Yu and Lin Yuan sharing a drink after dinner. Lin Yuan, clearly reluctant to see Gu Yu leave, convinces him to stay and enjoy some fine wine she bought. He agrees. The next morning, Tang Qi's mother arrives at his apartment, excited to find two pairs of shoes at the door, indicating her son has a girlfriend. She happily makes breakfast and overhears Tang Qi and Su Chengcheng joking around in the bedroom. Tang Qi is surprised to see his mother but admits he has a girlfriend. Su Chengcheng, all dressed up to meet Tang Qi's mother, suddenly turns into an alpaca! Tang Qi alerts her, and she barely avoids being discovered.
Su Chengcheng uses the filter bracelet to revert to her normal appearance, but as she's about to meet Tang Qi's mother, she transforms into Quan Shengtang. She rushes back to the bedroom, and Tang Qi's mother, noticing Su Chengcheng is in the same room as Tang Qi's friend, insists on investigating. Inside, Su Chengcheng has changed into Fang Jin. Tang Qi's mother, now searching for the other person and the alpaca, is confused. Fang Jin claims they were conducting an experiment, and Tang Qi lies, saying Su Chengcheng was kicked in the face by the alpaca and is too embarrassed to be seen. Tang Qi's mother, understanding, leaves without further questions.
Back in the room, Su Chengcheng checks the filter for malfunctions, but everything seems normal. However, when Tang Qi enters, Su Chengcheng turns into him. While they're having breakfast, Su Qingli calls Su Chengcheng, demanding she bring Tang Qi home for dinner. Su Chengcheng tries to refuse, but her sister is insistent.
Under orders from her sister, Su Chengcheng brings a very nervous Tang Qi home to meet her parents. Tang Qi consults Gu Yu for advice, who gives him a cookbook, knowing Su Chengcheng's parents are food enthusiasts. Tang Qi takes all the cookbooks, and Gu Yu even shares his personal cooking notes.
At Su Chengcheng's home, Tang Qi is anxious but manages to connect with her parents due to his culinary research. Su Chengcheng's mother tactfully gets Su Chengcheng out of the room, and her father cracks walnuts with his bare hands, a display of strength to intimidate Tang Qi and warn him not to hurt his daughter. This reminds Tang Qi of a high school memory where Su Chengcheng did the same.
Later, Su Chengcheng is on her way home, eating ice cream, when she encounters an elderly woman in the elevator. The woman is terrified of Su Chengcheng and flees. Su Chengcheng is puzzled, but things get worse when she arrives home and finds that no one can see or hear her. Realizing it's the filter, she checks her bracelet, but it's unresponsive. Looking in the mirror, she sees no reflection – she's invisible!
Su Chengcheng calls Tang Qi, but he can't hear her through the phone. She texts him, and he rushes out, only to find her phone on a bench. He approaches and touches her, realizing they can communicate through text. Su Chengcheng's father lies to Tang Qi, saying Su Chengcheng had to leave for a business meeting, and Su Chengcheng sends her father a text to confirm. Her father insists Tang Qi stay for dinner, and Su Chengcheng, invisible, enjoys her parents' cooking. A floating chicken leg terrifies her parents, but Tang Qi covers it up by claiming it's a magic trick. To solve Su Chengcheng's invisibility, Tang Qi decides to find the old woman who gave them the bracelet.