A lawyer sets out to commit the perfect murder.

Ex-Army officer Jameson takes a job a prison guard at San Quentin. Joe, the brother of his new girlfriend May, is sentenced to the prison for robbery. When Jameson tries to separate lawbreakers from hardened criminals, badguy Hansen tries to stir up trouble by telling Joe about Jameson's interest in his sister.

A prison-camp convict learns that his younger brother will soon be joining him behind bars.

A proud, pro-capital punishment district attorney with a 90% execution rate, finds himself wrongly convicted of murdering his estranged wife and sentenced to die. The woman he loves and his investigator rival for her affections rally to find the real killer, while he is confronted by the misery of life on death row.