Former World War II flying ace Matt Brennan takes a position as a test pilot for a commercial aircraft corporation and bumps into his old girlfriend, Jo Holloway, who now works as a receptionist for the company.

Two members of a crew of "sandhogs", men who work on an underwater tunnel project, battle each other over the same woman and a rival team of sandhogs to see who will finish their half of the tunnel first, with the winning team getting more money and guaranteed future work.

A mentally unstable man, who has been kept in isolation for years, escapes and causes trouble for his identical twin brother.

Wealthy John Glidden wants to give his money away to strangers rather than have his relatives fight over it. We see the effect the gifts have on many different sorts of individuals.

At a national park in Kenya, English game warden George Adamson and his wife, Joy, care for three orphaned lion cubs. After the two larger lions are shipped off to a zoo in the Netherlands, the smallest of the three, Elsa, stays with the couple. When Elsa is blamed for causing an elephant stampede in the nearby village, head warden John Kendall demands the young lion either be trained to survive in the wilds of the Serengeti or be sent to a zoo.