I love dancing K-POP with my best friend in our club. Though I am the tallest, the spotlight is mine at the center. But things are about to change- my best friend might become my ex-best friend; She's dating my secret crush! People say my mom and dad are a little unusual, but to me, they're just an ordinary family. The neighbor lady seems suspicious-she once filmed SNS videos with her daughter, and now she wants my mom to join instead. I have to stop this somehow. Maybe I should talk to her daughter first...

Seon-hwa is a new student at an elite medical school, and she is initiated into a dissection class headed by Dr. Han along with five other students, including her boyfriend Ki-beom. After the first class the students all start to share the same nightmare involving a one-eyed surgeon, and one by one they start to be murdered, the victims being discovered with their hearts removed. Seon-hwa and Ki-beom are convinced that these events are related to a beautiful cadaver with a rose tattoo on her breast, and they begin an investigation to uncover her identity.