Why did the girl have to lose her memory?

Original title: なぜ少女は記憶を失わなければならなかったのか？～心の科学者・成海朔の挑戦～

"Scientist of the heart: Narumi Saku's challenge"

2014 ★ 8.0 90 min IMDb Japanese Shunsuke Morita, Masahiro Ishida

Overview

When the suspect of an arson case refuses to cooperate with the investigation, the detectives search his house and find a locked-up little girl. She doesn't talk and there are no clues to her identity, so assistant psychology professor Narumi Saku is asked to counsel her.

Drama Mystery TV Movie