In the past, Michiru was a member of a track and field team, but is now wheelchair-bound after an accident. She helps the monster Falmagan, which was being bullied, and it falls in love with her. Falmagan is determined to heal her legs. There is a way, but it must sacrifice its own body in the process.

Preserved in an ancient layer of earth, the parasitic creatures that delay aging in their host, "Soma" are discovered. Some of the most talented humans are assembled to be surgically paired with the creatures. Among them, however, is a girl who questions what it means to live. And Haibara has his own misgivings...