Mystery 6 Episode 2

In the flashback, a radio broadcast reports the murder-suicide of a man and his family while a girl cowers in her room, writing in her diary. A dark figure barges in and kills her with a golf club. Donghae abruptly wakes up from the nightmare. The manager tells the weakened Donghae that his schedules have been canceled in order for him to rest. Meanwhile, Heechul goes on the set of his drama and Leeteuk and Kangin visits before attending their other schedules. On the way, they passed a strange little girl in the street. Kangin, Sungmin and Ryeowook return to the dorm. At their room, Sungmin go to bathroom and find Donghae unconscious on the bathroom floor. Then Kangin carried him to his room. As Donghae rests with Kibum (who trying soothe him by holding his hand for a while), the other members find a diary that belonged to a teenage girl while clearing out the former tenant's belongings. In her entries, it is revealed that she had suffered nightmares just like Donghae, and eventually it got worse. In the CCTV, the ghostly figure appears again, this time standing up. (Source: Wikipedia)