Freyja and Loki have been kidnapped. It is Hyoyeon’s job to save them by finding the hidden treasure of their family and gave it to the kidnappers. Of course, Hyoyeon needs help from her friends. But, where are they? It’s been 7 years had passed since the incident in the abandoned house happened.

13 boys and 13 girls went to an abandoned house to challenge themselves to stay there for 3 days. On their first night in abandoned house, Seohyun saw one of the girls, hanging on the ceiling, dead!