Jin Shu, whose nickname is "Mr Toilet", is a professional plumber who specializes in repairing toilet bowls. Upon learning that he wants to rent a room, a landlord offers him a room without the consent of another tenant, Xiu Xiu. Xiu Xiu has a deep-seated obsession with cleanliness and is hard to get along with. She also has a son, Zhi Xing, who is going through a rebellious phase ...

Hai Ning is a psychiatrist who is filled with vigour and enjoys helping people. While visiting her patient's home, she gets herself into a fire. Fortunately, Jin Shu manages to rescue her. Hai Ning seems to recall that he was her doctor, Dr Toh, last time. However, the people around her insist that the person who saved her is a plumber. Hai Ning is not convinced and gives Jin Shu a call, inviting him out for lunch to thank him ...

Through her helper, Hai Ning gets Jin Shu to go to her house to repair the toilet bowl. As she observes him, she is even more convinced that he is Dr Toh, but Jin Shu keeps on denying it. In order to sound him out, Hai Ning purposely scalds her hand in front of Jin Shu. However, he makes use of the traditional method of applying toothpaste on her wound. Evidently, he does not possess any medical knowledge, but Hai Ning remains suspicious of h...

Zhi Xing quarrels with Xiu Xiu and runs away from home to hide at Rui Ming's house. Rui Ming is a computer engineer and is without a doubt, a homebody. He is unable to visit crowded places. Si Ya is an undergraduate who lives in Liang Sheng's house. As her clothes fell to Rui Ming's flat, which is below hers, she goes to his house to retrieve it. Rui Ming falls for her at first sight. 智星与秀秀起冲突，离家出走，躲到锐铭家里。锐铭是名电脑工程师，是个不择不扣的宅男，喜欢窝在家里，无法去人多的地方。...

Xiu Xiu suffers from abdominal pain due to kidney stones and gets sent to the hospital. Jin Shu suspects that Xiu Xiu has Obsessive-Compulsive Disorder (OCD) when he learns that Xiu Xiu got kidney stones from holding back urine as she does not dare to use public toilets. He also thinks that the disorder has affected her daily life and health. He tries to provide some positive counselling after seeing that Zhi Xing has violent tendencies.

In order to uncover Jin Shu's real identity, Hai Ning comes up with a step-by-step plan for Jin Shu to fall into her trap. She misleads Jin Shu into thinking that her binge eating disorder is back. However, Jin Shu knows of Hai Ning's plan and does not fall for it. Jin Shu is even more certain that Xiu Xiu has Obsessive-Compulsive Disorder (OCD) and tries to figure out how to help her. 海宁为了查证瑾澍的真实身份，循序渐进，引瑾澍掉入自己所设的局，让瑾澍以为自己的贪食症再度复发。但瑾澍一早识破海宁...

To find out Jin Shu's identity, Hai Ning approaches Xiu Xiu for help but Xiu Xiu gives her the cold shoulder. While despondent, Hai Ning finds out that Jin Shu is her patient, Wei Yi's client. She decides to find out more through Wei Yi and finally confirms Jin Shu's real identity. However, she is unable to understand why Jin Shu wants to hide this fact. Jin Shu is startled awake by a strange nightmare and is fearful.

In hope of convincing Jin Shu to reconcile with his family members, Hai Ning gathered help from his brother, Jin Tao. Unfortunately, they did not manage to talk him round. Jin Tao opened up to Hai Ning on Jin Shu's traumatic episode in the past, when he sustained major injuries after falling from a building with his fiancee, who died from the fall.

After injuring his teacher, Zhi Xing was detained in the police station, sending Xiu Xiu into a state of worry. As Liang Sheng hints that Zhi Xing could be showing signs of aggressive and violent tendencies, Xiu Xiu recalls that Zhi Xing's violent behaviour could be caused by the domestic violence he went through as a child ...

As he noticed a Chinese restaurant waitress wearing stockings, Liang Sheng stalks her home and steals the stocking that was left to dry outside her flat. Having lived with fetishism for years, he finds himself uncontrollably stealing and hiding stockings in his closet. Xiu Xiu and Liang Sheng accompany Zhi Xing in court. She is displeased with Zhi Xing for being discourteous towards the judge.

As Rui Ming is determined to overcome his phobia, he attempts to find Si Ya in the shopping mall, only to have a relapse again. Si Ya discovers Rui Ming when he collapses and immediately brings him out of the mall. When she questions him on why he appeared in the shopping mall, Rui Ming keeps mum and avoids the question.

As Xiu Xiu despairs over the court's decision to allocate Zhi Xing into a Boys' Home, her Obsessive-compulsive Disorder (OCD) relapses. Liang Sheng tries to reassure her, taking the opportunity to confess his true feelings towards her. Unfortunately, he is rejected almost immediately. Feeling dejected, Liang Sheng approaches Jin Shu and lets out his problems, where Jin Shu comforts him out of good will.

In fear of experiencing a relapse again, Rui Ming turned down Si Ya's offer to watch a movie in a cinema together and suggested to watch it from home instead. Si Ya mentions to Rui Ming about a catwalk she will be participating in, hoping that he would be around to support her. However, concerned about the crowd that would be present at the event, Rui Ming tries to find an excuse to reject the invitation.

As Xiu Xiu decides to visit Zhi Xing in the home, Jin Shu offers to send her to the train station. However, Jin Shu starts to hallucinate en route to the station and sees Jie Fang, causing him to get distracted and lose control. As a result, an accident happens and Xiu Xiu loses consciousness from a head injury. Overwhelmed with guilt from causing harm to Xiu Xiu, Jin Shu decides to accept his illness and undergo treatment.

Liang Sheng was suspended by his school for his involvement in prostitution activities and hence faced social stigma for his situation. While still being unable to resist his temptations, he resorted to stealing stockings from his neighbour, Lily, only to be caught by Jin Shu. Upon knowledge of his fetishism, Jin Shu advises him to own up to the police to clear his name and seek medical help for his illness.

Upon witnessing the kiss between Hai Ning and Jin Shu, Xiu Xiu felt displeased and left hastily. Jin Shu caught up to Xiu Xiu to clear up the misunderstanding and confessed his feelings for her. Being unable to control his emotions, he initiated a kiss without knowledge of Xiu Xiu's phobia of intimate contact. Xiu Xiu pushed him away in fear and panicked, telling him that she can't return his feelings for her.

Looking back at five years ago, with his best-selling books, fully-booked schedule for talks and media interviews, Zhou JinShu was a rising celebrity psychiatrist and one of the sought-after psychiatrists in the social elites circle. While he was immersing himself in the sweet smell of success, he was ironically unaware that his girlfriend - JieFang had been suffering from a mental illness - “Delusion of Jealousy.” Feeling neglected and insecure,

While on her medical appointment, Xiu Xiu happens to find out about Hai Ning's deteriorating health and her frequent visits to the washroom. As Xiu Xiu brings the matter up to Jin Shu, he suspects that something may be off about Hai Ning and decides to visit her mother at her home. Jin Shu and Hai Ning's mother carefully investigate the situation, and find clues that confirm Hai Ning's eating disorder ...

Upon finding out about the flyers containing her nudes, Xiu Xiu feels overwhelmed with shame. Jin Shu notices threats written on the flyer and investigates the issue, only to find out that Zhi Xing was involved in the matter. Zhi Xing defends that he has nothing to do with the release of the photos, but was only using the opportunity to earn cash. Despite so, Jin Shu is shocked that Zhi Xing shows no sign of remorse for his actions. 秀秀发现自己的裸照传单，羞

Zheng Ye approaches Xiu Xiu and threatens her, only to be beaten up by Zhi Xing, thereafter sustaining serious injuries. While Zhi Xing initially did not feel an inch of guilt for his actions, upon witnessing Xiu Xiu begging the nurses to save Zheng Ye's life so that he will not be charged in court for murder, his heart softens. He finally understands Xiu Xiu's love for him as a mother and decides to forgive her, causing Xiu Xiu to let out tears