While celebrating with her friends in her new cheaply rented apartment on the thirteenth floor of a building, the young Sayaka unexpectedly jumps off the balcony committing suicide. Her mother goes insane and her older sister, Mariko, decides to investigate the mysterious death of her sister.

casts

Noriko Nakagoshi

Arata Furuta

Eriko Hatsune

Yuka Itaya

Naoko Ohtani