Otoshimono

On her way to school, high school girl Nana sees a train accident. Then Nana and her friend Kanae start to come across various bizarre phenomena, including red fingerprints and a female spirit who 'lives' on the station platform. One day, Nana's younger sister is lost, and the only possibility seems to be that she had been taken by these spirits. The missing tracks. The predictions that a mysterious woman makes.