The efforts of test pilot John Mitchell to make a better life for his wife Mary and their two children seem doomed to failure and he blames himself. At the Conway Aero-Manufacturing Company of Wolverhampton, Mitchell is to take the company's new rocket-propulsion transport plane up for tests, fully loaded and carrying two important passengers - Ministry official Crabtree and buyer's representative Ashmore. Mitchell learns from his boss, Reg Conway, that if Ashmore does not recommend the plane, t...