When two best friends May and Jublek are hanging around at the tutoring school in Siam Square, all lights go off. It’s not just the building – it has a blackout in the entire Siam Square, Bangkok’s most famous nerve center of young people. When the lights come back on, the two friends are reminded of a story told among students: Many years ago a girl went missing in Siam Square. Her spirit has haunted the place, and every time there’s a blackout, she will appear to take someone with her. The frightening tale takes hold of May and Jublek, as well as their group of friends who attend the same tutoring school.