Introducing story _ <444>
An underground secret warehouse of an insurance company.
Department manager Park (Park Seong-wung) and new employee Se-yeong (Lee Se-yeong) take out an old file.
Department manager Park, who notices Se-yeong's strange ability to communicate with dead persons, instructs Se-yeong to disclose the secrets of suspected cases of insurance frauds, and "Se-yeong" discovers clues to strange cases one by one.
Story one_ a strange story about distress
Two friends encounter distress on a cliff so high that the end is not seen (Seong Jun, Lee Su-hyeok).
All the food they have is one chocolate bar! In order for me to live, my friend should die!
Story two_ a strange story about a travel
Ji-eun (Baek Jin-hee), Mi-ra (Kim Seul-gi), and Seon-ju (Jeong In-seon) embark on an extempore trip to deal with the depression of failing the teacher certification examination. But an unexpected accident occurs, and their trip becomes a nightmare thereafter.
Story three_ a strange story about elevator
On the first day after being appointed as student teacher, Byeong-shin (Go Gyeong-pyo) is completely put to shame by students and is locked up at the entrance of hell while he is following a strange story told by a female high school student Tan-hee (Kim Ji-won). To go back, he needs to perform the charm taught by "Tan-hee"!