Movie plot

Mad Movie | 매드무비 | Former actress Ayaka is dating a Korean boyfriend, on the premise of getting married. Ayaka came to South Korea with her best friend Saori to greet his family. Soon, Ayaka meets crew, making horror movies. They urge Ayaka and her friends to appear in their new production, but Ayaka, who has a past as unsuccessful actress, was reluctant. However, because of her excited friends persuasion, she agrees to appear in the film. Staff takes Ayaka and her friends ,to a closed building that leads to the basement of the amusement park. However, is it really just about creating a film production, or something more sinister is going on there?