Rafferty tries to prove that a man killed a fiery plane crash didn't commit suicide.
A private eye from an insurance company approaches Rafferty to determine if his friend Tom Hampton committed suicide by crashing his plane. Rafferty performs an autopsy and gathers information about a rare disease that could have hampered his ability while flying.
Rafferty is called to be a witness in the case of a pilot who crashes to his death shortly after taking up an insurance policy. An insurance investigator, Jerry, approaches Rafferty to testify that the pilot, Tom, was in good health when he crashed.
Rafferty's testimony is deemed to be especially useful and important because he was the one who certified Tom medically fit after a thorough check-up.
In the meantime, Tom's widow, Grace, wants Rafferty to try and find out how her husband, who was a competent pilot, could have met with the mishap.
Did Tom genuinely lose control of the plane or was it suicide?