On a small Mexican island dwells a group of Indians who live in the traditional manner and who disdain outsiders. The beautiful Maclovia and the poverty-stricken Jose Maria are in love, but her father refuses to allow their marriage, or even any communication between them, due to Jose Maria's lack of means.

　　在1923年的西非，法官罗哈利和强生，深感民间疾苦，决心为居民修筑一条百里大道。因经费不足先动用其他经费，但被财政官员丁大人查觉，而失去职位转行在警官的商店偷钱并误杀警官，罗哈利受命调查并查出凶手是强生。在正义与友情间，他面临抉择。