Annie and Joe can hardly wait to meet the impressive Mr Amos Strong, the bridge engineer. After a brief encounter with a grumpy foreman, the kids aren’t disappointed by the hero and role model, Mr Strong. He finds second rate lumber, and orders his foreman, Mr Logan, to get rid of it, and use the good stuff.
Mr Strong takes time to tell the kids how the bridge foundations are constructed. The Texan, former cow puncher, and college grad is equally impressed with his new young friends.
As the engineer parts ways to inspect the work, Annie and her friends continue to admire him from afar. Suddenly, something goes all wrong, and logs in the bridge begin to collapse. Is it an accident, or sabotage?