一位传记作家在研究一本关于一名在新飞机试飞中死亡的飞行员的书时，爱上了飞行员的妹妹。随着他对试飞的更多了解，与此案有关的人开始死亡。
John Justin
Philip Chance
Margaret Leighton
Helen Teckman
Duncan Lamont
Detective Inspector Hilton
Raymond Huntley
Maurice Miller
Meier Tzelniker
John Rice
Roland Culver
Detective Inspector-Major Harris
Michael Medwin
Martin Teckman
Jane Wenham
Ruth Wade
George Coulouris
Andrew Garvin
Harry Locke
Leonard
Warwick Ashton
The Detective Sergeant
Andreas Malandrinos
Small Waiter
Mollie Palmer
Stewardess
Irene Lister
Waitress
