Fang Yiyan (played by Mandy Wong), who was born into a legal family, became a disciple of the famous legal figure Au Yeung Yat-po (played by Lee Kwok-lun). He achieved outstanding results, but after completing his apprenticeship, he turned against his master and became a practicing barrister, often clashing with his master in court. Yi-yin has been hiding the fact that he has multiple personality problems. His secondary personality is a wild player named Pineapple Coconut Milk (Mandy Wong), who is brave and aggressive, and his other personality is Sad Bo-bo (Mandy Wong), who is afraid of things and pessimistic, with a sad face. Upon learning this secret, Li Dongjia (Benjamin Yuen) takes the opportunity to threaten Yi-yin to hire him as an intern in order to ensure that Yi-yin can smoothly marry the city's diamond bachelor Ji Xiaoyong (Sun Chan). Yi-yin reluctantly agrees, and the two of them embark on a unique experience. Yi-yin's personality will suddenly change, often making Yi-yin behave in court and causing a lot of jokes. The only person who knows the source of Yi-yin's illness is her mother Fang Hua Qi-si (Gigi Wong). Unfortunately, Qi-si never mentions the past. During this period, Dongjia gradually becomes friends with Coconut Milk and Bo-bo. Yi-yin is determined to make them disappear together to eliminate future troubles...