The spoilt young son of a wealthy railroad owner manages to get himself lost in the middle of nowhere. He is found by a cowboy on a cattle drive and the lad must start learning the hard lessons of working in a team if he wants to make it to San Diego.

Industrialist François Delambre is called late at night by his sister-in-law, Helene Delambre, who tells him that she has just killed her husband, André. Reluctant at first, she eventually explains to the police that André invented a matter transportation apparatus and, while experimenting on himself, a fly entered the chamber during the matter transference.