More than just naughty, they play tricks on classmates, tease girls at school, fight with other boys, and lie to everyone until their teacher breaks down. They are named Liar No. 1 and Liar...

Our story begins with Junior Detective LIN, who has just been put in charge of a case that appears to be a suicide. Most curiously, the crime scene has many features in common with a scene from a Sherlock Holmes novel. Detective Lin quickly discovers that it is a murder case. Meanwhile, a group of young sleuths supports their detective club president GAO’s dream to win a writing contest. The three club members, psychologist ZHONG, social worker WEN, and pharmacist ZHANG, each harbor a hidden secret. GAO could never have expected that he would become implicated as the killer in an actual murder case! As Detective LIN delves deeper into his case, a series of seemingly unrelated events all end up pointing towards the club members.

Hsu-Chuan, who works at a game company, accidentally brings home a broken clay doll from a haunted house while developing a new horror VR game. Unexpectedly, his pregnant wife, Mu-Hua, a cultural relic restorer, develops an obsession with the doll and relentlessly tries to repair it. As strange things begin to happen in the house, Mu-Hua's condition deteriorates, and Hsu-Chuan, at his wits' end, seeks help from a spiritual medium, Ah-Sheng. Meanwhile, the horrifying secret hidden behind the clay doll begins to surface.

A-Li, president of the Alligator Magic Club, organizes a graduation trip to fulfill his dream of finding the legendary "Si-kret" stone, said to grant wishes. Joined by club members and their driver, the group embarks on the journey with high hopes. However, relentless rain, winding mountain roads, and mounting tensions challenge their resolve.