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.

• Career & Bridge
• T.O. Entertainment
• Noriko Nakagoshi
• Arata Furuta
• Eriko Hatsune
• Yuka Itaya
• Naoko Ohtani
• Akira Fukada
• Toshinobu Matsuo
• Shion Machida