An environmental analyst is asked by the police to determine if two deaths by hydrogen sulfide poisoning are an accident - or a murder. But when he meets a young woman at both sites, a scientific mystery begins.
Sio Sakurai , Sudzu Khirose , Sota Fukusi , Rei Dan , Riri Frenki , Tao Okamoto , Eriko Sato , Mirai Sida , Masanobu Takasima , Khirosi Tamaki
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