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.
2019
1918
1971
1958
2022
1992
2006
2002
1937
1999
1990
2003
2007
1997
1972
1963
1978
1974
1975
1970