In 1984, a major fire broke out on the fourth floor of the Jin Xin Building, the residents on the 4th floor were trapped in the fire as the fire exits were blocked, which claimed a total of 19 lives. Pei who possesses psychic abilities, moves into the building, teaming up with Shao, a horror novelist seeking inspiration within the building, they investigate numerous unexplained terrifying events and aim to uncover the truth behind the tragic fire..

After returning from the resort vacation, Marcy, a mother and live streamer, experienced bizarre symptoms, and her accompanying staff member, Zhao, inexplicably passed away. A friend of Ah Xu, Tianren, uploaded the eerie footage captured by Zhao before his death, garnering significant online traffic. In a state of panic and rebellion, Ah Xu, either to uncover the truth or for the sake of false popularity, concealed this from her family and begged her sister to keep it a secret. She decided to join forces with Tianren to call upon internet friends to investigate the vacation resort.

When Red’s boyfriend breaks up with her on her 30th birthday and throws himself at her new boss, she quits her job and signs up for a new Instagram account to start ranting about her shameless ex. Her life takes a dramatic turn when her posts go viral.

Weng Wen-fang (Hsieh Ying-hsuan) came from a political family. She joined the Justice Party as the deputy director and spokesperson of the Publicity Department, after failing to be re-elected as a member of the Council. She led the publicity team in realizing their goals, but not without facing many challenges to their faith and values.

Asheng, once a gang member of the Zhongshan District, was sent to jail for 12 years after saving his friend Shaou. He is released and returns to Linsen North Road, his old turf, finding it familiar yet perplexing after being away for so many years. Shaou is now a mob boss with his own turf. When the son of Seagull’s patron, Mr. Xiao, is murdered, the evidence points to up-and-coming mobster Monkey. Shauo tries to ambush Monkey and fails, getting shot by the drugged up gangster instead. Asheng, who initially refused to help Shaou, is now filled with rage and decides to avenge his friend.

Rescue member Ajie and his companions rescued a reef tanker in the storm, but met the captain who was stubborn and unwilling to give up. At the same time, a dark shadow haunted the deep sea and dragged everyone into the sea. From then on, the surviving Ajie, bearing the shadow of his colleagues' deaths, became decadent and disheartened. Many years later, Ajie overcomes the shadow and boards a fishing boat again. They rescue Xiaojing, who had fallen into the sea after his yacht overturned. Once onboard, things start growing strange. When the trapped people face the storm's severe test, they find the most dangerous thing is far more than this. There are unknown creatures coveting under the water. The savage people must put aside their prejudices and work together to survive.

The story centers on CHEN Wei and her daughter, seeking refuge from CHEN Wei’s violent husband in the Butterfly Mansion, known for its eerie reputation as a suicide hotspot. Strange events unfold, and warnings from Uncle LIANG, the building’s janitor, and Uncle Shan, the temple caretaker who lives on the top floor, about the unsafe floor are ignored due to financial constraints. Neighbors like Ah Di, who sees spirits, and the forbidden Room No. 613, intensify CHEN’s unease. Substitute manager Xiao Liang cares for CHEN, with her daughter showing joy in his visits. As the Chinese ghost month progresses, supernatural events escalate, revealing a crisis beyond CHEN Wei’s initial struggles.