A woman sets out to fathom the mystery of her sister's "suicide" and nearly loses her own life to a killer.

A petroleum engineer is sought by the police to testify in a law case.

A young woman's car breaks down in front of an abandoned garage which is used as headquarters for a band of crooks. Her sudden appearance on the scene causes some unforeseen complications in the gang's plans and she unwittingly becomes an accomplice to a planned robbery.