Yeo Min-joo

A group of high school students and teachers who get locked in the school after the swimming instructor is murdered.

Eun-A lost her family at the hands of a serial killer. She is now mentally and physically destroyed. She then decides to get revenge by enlists the help of four people from different life to fulfill her revenge.

A man tries to find the killer of his sister and wants to take revenge. But therefore he needs the help of a medium.