Due to one of her friend's suggestion, the 13 yearl old japanese school girl, Yuko one day goes to girls' bathroom on the third floor of her school, to try the popular rituale of summoning the ghost girl ,,Hanako-san,, from that urban legend. 
The girl knock on the door and say the name three times, as she should do, but when she eventually opens the door, she finds something quite unexpected....something wich she has never heard of before.....

Something about Hanako-san...