The Universe

All characters and background of the cases are fictional, but takes place in the same universe. Here is the list with all the connections of the cases.

S1 Case 1
Passionate He found the CD of NZND’s debut song in Senior Qiao’s room
The boy group got introduced for the first time in S1 Case 3

S1 Case 3
The business card of a plastic surgery hospital was found in Vocal Da’s room
The name Beauty Zhen or Zhen Beauty was written on the business card
Zhen Beauty is the hospital name of S1 Case 8

The artist Mango (S1 Prologue) wanted to sue Rap Bai

S1 Case 6
Perfume He revealed to be a fan of NZND

S1 Case 8
The members of NZND appeared in the commercial of Zhen Beauty plastic surgery hospital

Patient Sa is a celebrity from MG Entertainment like NZND

S1 Case 10
School-Flower Ou revealed to have an excavator license
NZND’s debut song “Will you still love me if I drove an excavator?” was inspired by her

S2 Case 4
Security Wei revealed to be the same person as General Wei of S2 Case 1

February He (S2 Case 9) was on Antique He’s family tree

Antique He had done plastic surgery at Zhen Beauty plastic surgery hospital

S2 Case 5
This case is about the former boyband NZND, 5 years after S1 Case 3

S2 Case 9
February He mentions Generalissimo Yan of S1 Case 11

S2 Case 11
Huang Zhen admits that he is Tyran Zhen (S1 Prologue)’s brother

S3 Case 1
Richest Bai revealed to be the owner of Alibaibai
The company that Scholar Bai was founding in S1 Case 7
This proves that these two are the same person

S3 Case 3
Long Sa is rumoured to be Bully Sa of S1 Case 7

Insurance Bai of S2 Case 8 sold an insurance to the deceased

Salon Gui admits to be a fan of Rap Bai

S3 Case 4
The sequal of S2 Case 5, 5 years after the case

Super-Famous Gui revealed to be the same person as Salon Gui of S3 Case 3

S3 Case 10
Detective Da revealed to be the owner of Hehehe Agency
The agency was mentioned multiple times through the seasons and was mentioned for the first time in S1 Case 5

S4 Case 3
The pre-debut story of NZND (S1 Case 3)

S4 Case 4
Insurance Bai of S2 Case 8 sold an insurance to Lying Sa

S4 Case 5
In-love Tan had once dated Manager Zhang (S3 Case 1), Vocal Da (S1 Case 3) & Delivery Xun (S3 Case 3)