Brilliant attorney Woo Young-woo tackles challenges in the courtroom and beyond as a newbie at a top law firm and a woman on the autism spectrum.

A girl wakes up in a huge secret laboratory. then accidentally meets another girl who is trying to protect her house from a gang. The mystery girl overthrows the gang with her unexpected powers, and laboratory staff set out to find her.

University students Yoon Jin-Myung, Jung Ye-Eun, Song Ji-Won, Kang Yi-Na and Yoo Eun-Jae share a house. Jin-Myung is busy supporting herself financially and studying. She suffers from lack of sleep. Ye-Eun is devoted to her boyfriend, she is clear about what she likes or not. Ji-Won has a bright personality and likes to drink. Yi-Na is popular due to her beautiful appearance. Eun-Jae is timid, but she has an unique taste for men.

Se-hee is haunted by her step sister Tae-yeon who used to be a promising swimmer but suddenly killed herself in a swimming pool 2 years ago. During the summer vacation, she joins the study camp at school for upcoming college entrance exam with other 30 elite students. On the first night, when Se-hee finds a riddling passage scribbled in the desk, she soon sees a dead girl’s body hung upside down. Then the TV monitors are on and the students watch another friend crushed by his bike in the corridor. Since then, the succession of cruel killings occurs whenever they fail to answer the given questions in time. Meanwhile, the hidden truth behind Tae-yeon’s suicide is slowly revealed and terrified students struggle to death to undo the puzzle before they become the next victim.